Merge branch 's3c-iis-header' into for-2.6.30
[linux-2.6] / drivers / char / applicom.c
1 /* Derived from Applicom driver ac.c for SCO Unix                            */
2 /* Ported by David Woodhouse, Axiom (Cambridge) Ltd.                         */
3 /* dwmw2@infradead.org 30/8/98                                               */
4 /* $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $                          */
5 /* This module is for Linux 2.1 and 2.2 series kernels.                      */
6 /*****************************************************************************/
7 /* J PAGET 18/02/94 passage V2.4.2 ioctl avec code 2 reset to les interrupt  */
8 /* ceci pour reseter correctement apres une sortie sauvage                   */
9 /* J PAGET 02/05/94 passage V2.4.3 dans le traitement de d'interruption,     */
10 /* LoopCount n'etait pas initialise a 0.                                     */
11 /* F LAFORSE 04/07/95 version V2.6.0 lecture bidon apres acces a une carte   */
12 /*           pour liberer le bus                                             */
13 /* J.PAGET 19/11/95 version V2.6.1 Nombre, addresse,irq n'est plus configure */
14 /* et passe en argument a acinit, mais est scrute sur le bus pour s'adapter  */
15 /* au nombre de cartes presentes sur le bus. IOCL code 6 affichait V2.4.3    */
16 /* F.LAFORSE 28/11/95 creation de fichiers acXX.o avec les differentes       */
17 /* adresses de base des cartes, IOCTL 6 plus complet                         */
18 /* J.PAGET le 19/08/96 copie de la version V2.6 en V2.8.0 sans modification  */
19 /* de code autre que le texte V2.6.1 en V2.8.0                               */
20 /*****************************************************************************/
21
22
23 #include <linux/kernel.h>
24 #include <linux/module.h>
25 #include <linux/interrupt.h>
26 #include <linux/slab.h>
27 #include <linux/errno.h>
28 #include <linux/miscdevice.h>
29 #include <linux/pci.h>
30 #include <linux/wait.h>
31 #include <linux/init.h>
32 #include <linux/fs.h>
33
34 #include <asm/io.h>
35 #include <asm/uaccess.h>
36
37 #include "applicom.h"
38
39
40 /* NOTE: We use for loops with {write,read}b() instead of 
41    memcpy_{from,to}io throughout this driver. This is because
42    the board doesn't correctly handle word accesses - only
43    bytes. 
44 */
45
46
47 #undef DEBUG
48
49 #define MAX_BOARD 8             /* maximum of pc board possible */
50 #define MAX_ISA_BOARD 4
51 #define LEN_RAM_IO 0x800
52 #define AC_MINOR 157
53
54 #ifndef PCI_VENDOR_ID_APPLICOM
55 #define PCI_VENDOR_ID_APPLICOM                0x1389
56 #define PCI_DEVICE_ID_APPLICOM_PCIGENERIC     0x0001
57 #define PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN 0x0002
58 #define PCI_DEVICE_ID_APPLICOM_PCI2000PFB     0x0003
59 #endif
60
61 static char *applicom_pci_devnames[] = {
62         "PCI board",
63         "PCI2000IBS / PCI2000CAN",
64         "PCI2000PFB"
65 };
66
67 static struct pci_device_id applicom_pci_tbl[] = {
68         { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCIGENERIC) },
69         { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN) },
70         { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000PFB) },
71         { 0 }
72 };
73 MODULE_DEVICE_TABLE(pci, applicom_pci_tbl);
74
75 MODULE_AUTHOR("David Woodhouse & Applicom International");
76 MODULE_DESCRIPTION("Driver for Applicom Profibus card");
77 MODULE_LICENSE("GPL");
78
79 MODULE_SUPPORTED_DEVICE("ac");
80
81
82 static struct applicom_board {
83         unsigned long PhysIO;
84         void __iomem *RamIO;
85         wait_queue_head_t FlagSleepSend;
86         long irq;
87         spinlock_t mutex;
88 } apbs[MAX_BOARD];
89
90 static unsigned int irq = 0;    /* interrupt number IRQ       */
91 static unsigned long mem = 0;   /* physical segment of board  */
92
93 module_param(irq, uint, 0);
94 MODULE_PARM_DESC(irq, "IRQ of the Applicom board");
95 module_param(mem, ulong, 0);
96 MODULE_PARM_DESC(mem, "Shared Memory Address of Applicom board");
97
98 static unsigned int numboards;  /* number of installed boards */
99 static volatile unsigned char Dummy;
100 static DECLARE_WAIT_QUEUE_HEAD(FlagSleepRec);
101 static unsigned int WriteErrorCount;    /* number of write error      */
102 static unsigned int ReadErrorCount;     /* number of read error       */
103 static unsigned int DeviceErrorCount;   /* number of device error     */
104
105 static ssize_t ac_read (struct file *, char __user *, size_t, loff_t *);
106 static ssize_t ac_write (struct file *, const char __user *, size_t, loff_t *);
107 static int ac_ioctl(struct inode *, struct file *, unsigned int,
108                     unsigned long);
109 static irqreturn_t ac_interrupt(int, void *);
110
111 static const struct file_operations ac_fops = {
112         .owner = THIS_MODULE,
113         .llseek = no_llseek,
114         .read = ac_read,
115         .write = ac_write,
116         .ioctl = ac_ioctl,
117 };
118
119 static struct miscdevice ac_miscdev = {
120         AC_MINOR,
121         "ac",
122         &ac_fops
123 };
124
125 static int dummy;       /* dev_id for request_irq() */
126
127 static int ac_register_board(unsigned long physloc, void __iomem *loc, 
128                       unsigned char boardno)
129 {
130         volatile unsigned char byte_reset_it;
131
132         if((readb(loc + CONF_END_TEST)     != 0x00) ||
133            (readb(loc + CONF_END_TEST + 1) != 0x55) ||
134            (readb(loc + CONF_END_TEST + 2) != 0xAA) ||
135            (readb(loc + CONF_END_TEST + 3) != 0xFF))
136                 return 0;
137
138         if (!boardno)
139                 boardno = readb(loc + NUMCARD_OWNER_TO_PC);
140
141         if (!boardno || boardno > MAX_BOARD) {
142                 printk(KERN_WARNING "Board #%d (at 0x%lx) is out of range (1 <= x <= %d).\n",
143                        boardno, physloc, MAX_BOARD);
144                 return 0;
145         }
146
147         if (apbs[boardno - 1].RamIO) {
148                 printk(KERN_WARNING "Board #%d (at 0x%lx) conflicts with previous board #%d (at 0x%lx)\n", 
149                        boardno, physloc, boardno, apbs[boardno-1].PhysIO);
150                 return 0;
151         }
152
153         boardno--;
154
155         apbs[boardno].PhysIO = physloc;
156         apbs[boardno].RamIO = loc;
157         init_waitqueue_head(&apbs[boardno].FlagSleepSend);
158         spin_lock_init(&apbs[boardno].mutex);
159         byte_reset_it = readb(loc + RAM_IT_TO_PC);
160
161         numboards++;
162         return boardno + 1;
163 }
164
165 static void __exit applicom_exit(void)
166 {
167         unsigned int i;
168
169         misc_deregister(&ac_miscdev);
170
171         for (i = 0; i < MAX_BOARD; i++) {
172
173                 if (!apbs[i].RamIO)
174                         continue;
175
176                 if (apbs[i].irq)
177                         free_irq(apbs[i].irq, &dummy);
178
179                 iounmap(apbs[i].RamIO);
180         }
181 }
182
183 static int __init applicom_init(void)
184 {
185         int i, numisa = 0;
186         struct pci_dev *dev = NULL;
187         void __iomem *RamIO;
188         int boardno, ret;
189
190         printk(KERN_INFO "Applicom driver: $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $\n");
191
192         /* No mem and irq given - check for a PCI card */
193
194         while ( (dev = pci_get_class(PCI_CLASS_OTHERS << 16, dev))) {
195
196                 if (!pci_match_id(applicom_pci_tbl, dev))
197                         continue;
198                 
199                 if (pci_enable_device(dev))
200                         return -EIO;
201
202                 RamIO = ioremap_nocache(pci_resource_start(dev, 0), LEN_RAM_IO);
203
204                 if (!RamIO) {
205                         printk(KERN_INFO "ac.o: Failed to ioremap PCI memory "
206                                 "space at 0x%llx\n",
207                                 (unsigned long long)pci_resource_start(dev, 0));
208                         pci_disable_device(dev);
209                         return -EIO;
210                 }
211
212                 printk(KERN_INFO "Applicom %s found at mem 0x%llx, irq %d\n",
213                        applicom_pci_devnames[dev->device-1],
214                            (unsigned long long)pci_resource_start(dev, 0),
215                        dev->irq);
216
217                 boardno = ac_register_board(pci_resource_start(dev, 0),
218                                 RamIO, 0);
219                 if (!boardno) {
220                         printk(KERN_INFO "ac.o: PCI Applicom device doesn't have correct signature.\n");
221                         iounmap(RamIO);
222                         pci_disable_device(dev);
223                         continue;
224                 }
225
226                 if (request_irq(dev->irq, &ac_interrupt, IRQF_SHARED, "Applicom PCI", &dummy)) {
227                         printk(KERN_INFO "Could not allocate IRQ %d for PCI Applicom device.\n", dev->irq);
228                         iounmap(RamIO);
229                         pci_disable_device(dev);
230                         apbs[boardno - 1].RamIO = NULL;
231                         continue;
232                 }
233
234                 /* Enable interrupts. */
235
236                 writeb(0x40, apbs[boardno - 1].RamIO + RAM_IT_FROM_PC);
237
238                 apbs[boardno - 1].irq = dev->irq;
239         }
240
241         /* Finished with PCI cards. If none registered, 
242          * and there was no mem/irq specified, exit */
243
244         if (!mem || !irq) {
245                 if (numboards)
246                         goto fin;
247                 else {
248                         printk(KERN_INFO "ac.o: No PCI boards found.\n");
249                         printk(KERN_INFO "ac.o: For an ISA board you must supply memory and irq parameters.\n");
250                         return -ENXIO;
251                 }
252         }
253
254         /* Now try the specified ISA cards */
255
256         for (i = 0; i < MAX_ISA_BOARD; i++) {
257                 RamIO = ioremap_nocache(mem + (LEN_RAM_IO * i), LEN_RAM_IO);
258
259                 if (!RamIO) {
260                         printk(KERN_INFO "ac.o: Failed to ioremap the ISA card's memory space (slot #%d)\n", i + 1);
261                         continue;
262                 }
263
264                 if (!(boardno = ac_register_board((unsigned long)mem+ (LEN_RAM_IO*i),
265                                                   RamIO,i+1))) {
266                         iounmap(RamIO);
267                         continue;
268                 }
269
270                 printk(KERN_NOTICE "Applicom ISA card found at mem 0x%lx, irq %d\n", mem + (LEN_RAM_IO*i), irq);
271
272                 if (!numisa) {
273                         if (request_irq(irq, &ac_interrupt, IRQF_SHARED, "Applicom ISA", &dummy)) {
274                                 printk(KERN_WARNING "Could not allocate IRQ %d for ISA Applicom device.\n", irq);
275                                 iounmap(RamIO);
276                                 apbs[boardno - 1].RamIO = NULL;
277                         }
278                         else
279                                 apbs[boardno - 1].irq = irq;
280                 }
281                 else
282                         apbs[boardno - 1].irq = 0;
283
284                 numisa++;
285         }
286
287         if (!numisa)
288                 printk(KERN_WARNING "ac.o: No valid ISA Applicom boards found "
289                                 "at mem 0x%lx\n", mem);
290
291  fin:
292         init_waitqueue_head(&FlagSleepRec);
293
294         WriteErrorCount = 0;
295         ReadErrorCount = 0;
296         DeviceErrorCount = 0;
297
298         if (numboards) {
299                 ret = misc_register(&ac_miscdev);
300                 if (ret) {
301                         printk(KERN_WARNING "ac.o: Unable to register misc device\n");
302                         goto out;
303                 }
304                 for (i = 0; i < MAX_BOARD; i++) {
305                         int serial;
306                         char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
307
308                         if (!apbs[i].RamIO)
309                                 continue;
310
311                         for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
312                                 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
313
314                         boardname[serial] = 0;
315
316
317                         printk(KERN_INFO "Applicom board %d: %s, PROM V%d.%d",
318                                i+1, boardname,
319                                (int)(readb(apbs[i].RamIO + VERS) >> 4),
320                                (int)(readb(apbs[i].RamIO + VERS) & 0xF));
321                         
322                         serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + 
323                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + 
324                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
325
326                         if (serial != 0)
327                                 printk(" S/N %d\n", serial);
328                         else
329                                 printk("\n");
330                 }
331                 return 0;
332         }
333
334         else
335                 return -ENXIO;
336
337 out:
338         for (i = 0; i < MAX_BOARD; i++) {
339                 if (!apbs[i].RamIO)
340                         continue;
341                 if (apbs[i].irq)
342                         free_irq(apbs[i].irq, &dummy);
343                 iounmap(apbs[i].RamIO);
344         }
345         pci_disable_device(dev);
346         return ret;
347 }
348
349 module_init(applicom_init);
350 module_exit(applicom_exit);
351
352
353 static ssize_t ac_write(struct file *file, const char __user *buf, size_t count, loff_t * ppos)
354 {
355         unsigned int NumCard;   /* Board number 1 -> 8           */
356         unsigned int IndexCard; /* Index board number 0 -> 7     */
357         unsigned char TicCard;  /* Board TIC to send             */
358         unsigned long flags;    /* Current priority              */
359         struct st_ram_io st_loc;
360         struct mailbox tmpmailbox;
361 #ifdef DEBUG
362         int c;
363 #endif
364         DECLARE_WAITQUEUE(wait, current);
365
366         if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
367                 static int warncount = 5;
368                 if (warncount) {
369                         printk(KERN_INFO "Hmmm. write() of Applicom card, length %zd != expected %zd\n",
370                                count, sizeof(struct st_ram_io) + sizeof(struct mailbox));
371                         warncount--;
372                 }
373                 return -EINVAL;
374         }
375
376         if(copy_from_user(&st_loc, buf, sizeof(struct st_ram_io))) 
377                 return -EFAULT;
378         
379         if(copy_from_user(&tmpmailbox, &buf[sizeof(struct st_ram_io)],
380                           sizeof(struct mailbox))) 
381                 return -EFAULT;
382
383         NumCard = st_loc.num_card;      /* board number to send          */
384         TicCard = st_loc.tic_des_from_pc;       /* tic number to send            */
385         IndexCard = NumCard - 1;
386
387         if((NumCard < 1) || (NumCard > MAX_BOARD) || !apbs[IndexCard].RamIO)
388                 return -EINVAL;
389
390 #ifdef DEBUG
391         printk("Write to applicom card #%d. struct st_ram_io follows:",
392                IndexCard+1);
393
394                 for (c = 0; c < sizeof(struct st_ram_io);) {
395                 
396                         printk("\n%5.5X: %2.2X", c, ((unsigned char *) &st_loc)[c]);
397
398                         for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
399                                 printk(" %2.2X", ((unsigned char *) &st_loc)[c]);
400                         }
401                 }
402
403                 printk("\nstruct mailbox follows:");
404
405                 for (c = 0; c < sizeof(struct mailbox);) {
406                         printk("\n%5.5X: %2.2X", c, ((unsigned char *) &tmpmailbox)[c]);
407
408                         for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
409                                 printk(" %2.2X", ((unsigned char *) &tmpmailbox)[c]);
410                         }
411                 }
412
413                 printk("\n");
414 #endif
415
416         spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
417
418         /* Test octet ready correct */
419         if(readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) > 2) { 
420                 Dummy = readb(apbs[IndexCard].RamIO + VERS);
421                 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
422                 printk(KERN_WARNING "APPLICOM driver write error board %d, DataFromPcReady = %d\n",
423                        IndexCard,(int)readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY));
424                 DeviceErrorCount++;
425                 return -EIO;
426         }
427         
428         /* Place ourselves on the wait queue */
429         set_current_state(TASK_INTERRUPTIBLE);
430         add_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
431
432         /* Check whether the card is ready for us */
433         while (readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) != 0) {
434                 Dummy = readb(apbs[IndexCard].RamIO + VERS);
435                 /* It's busy. Sleep. */
436
437                 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
438                 schedule();
439                 if (signal_pending(current)) {
440                         remove_wait_queue(&apbs[IndexCard].FlagSleepSend,
441                                           &wait);
442                         return -EINTR;
443                 }
444                 spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
445                 set_current_state(TASK_INTERRUPTIBLE);
446         }
447
448         /* We may not have actually slept */
449         set_current_state(TASK_RUNNING);
450         remove_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
451
452         writeb(1, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
453
454         /* Which is best - lock down the pages with rawio and then
455            copy directly, or use bounce buffers? For now we do the latter 
456            because it works with 2.2 still */
457         {
458                 unsigned char *from = (unsigned char *) &tmpmailbox;
459                 void __iomem *to = apbs[IndexCard].RamIO + RAM_FROM_PC;
460                 int c;
461
462                 for (c = 0; c < sizeof(struct mailbox); c++)
463                         writeb(*(from++), to++);
464         }
465
466         writeb(0x20, apbs[IndexCard].RamIO + TIC_OWNER_FROM_PC);
467         writeb(0xff, apbs[IndexCard].RamIO + NUMCARD_OWNER_FROM_PC);
468         writeb(TicCard, apbs[IndexCard].RamIO + TIC_DES_FROM_PC);
469         writeb(NumCard, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
470         writeb(2, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
471         writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
472         Dummy = readb(apbs[IndexCard].RamIO + VERS);
473         spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
474         return 0;
475 }
476
477 static int do_ac_read(int IndexCard, char __user *buf,
478                 struct st_ram_io *st_loc, struct mailbox *mailbox)
479 {
480         void __iomem *from = apbs[IndexCard].RamIO + RAM_TO_PC;
481         unsigned char *to = (unsigned char *)mailbox;
482 #ifdef DEBUG
483         int c;
484 #endif
485
486         st_loc->tic_owner_to_pc = readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC);
487         st_loc->numcard_owner_to_pc = readb(apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
488
489
490         {
491                 int c;
492
493                 for (c = 0; c < sizeof(struct mailbox); c++)
494                         *(to++) = readb(from++);
495         }
496         writeb(1, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
497         writeb(1, apbs[IndexCard].RamIO + TYP_ACK_FROM_PC);
498         writeb(IndexCard+1, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
499         writeb(readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC), 
500                apbs[IndexCard].RamIO + TIC_ACK_FROM_PC);
501         writeb(2, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
502         writeb(0, apbs[IndexCard].RamIO + DATA_TO_PC_READY);
503         writeb(2, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
504         Dummy = readb(apbs[IndexCard].RamIO + VERS);
505
506 #ifdef DEBUG
507                 printk("Read from applicom card #%d. struct st_ram_io follows:", NumCard);
508
509                 for (c = 0; c < sizeof(struct st_ram_io);) {
510                         printk("\n%5.5X: %2.2X", c, ((unsigned char *)st_loc)[c]);
511
512                         for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
513                                 printk(" %2.2X", ((unsigned char *)st_loc)[c]);
514                         }
515                 }
516
517                 printk("\nstruct mailbox follows:");
518
519                 for (c = 0; c < sizeof(struct mailbox);) {
520                         printk("\n%5.5X: %2.2X", c, ((unsigned char *)mailbox)[c]);
521
522                         for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
523                                 printk(" %2.2X", ((unsigned char *)mailbox)[c]);
524                         }
525                 }
526                 printk("\n");
527 #endif
528         return (sizeof(struct st_ram_io) + sizeof(struct mailbox));
529 }
530
531 static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_t *ptr)
532 {
533         unsigned long flags;
534         unsigned int i;
535         unsigned char tmp;
536         int ret = 0;
537         DECLARE_WAITQUEUE(wait, current);
538 #ifdef DEBUG
539         int loopcount=0;
540 #endif
541         /* No need to ratelimit this. Only root can trigger it anyway */
542         if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
543                 printk( KERN_WARNING "Hmmm. read() of Applicom card, length %zd != expected %zd\n",
544                         count,sizeof(struct st_ram_io) + sizeof(struct mailbox));
545                 return -EINVAL;
546         }
547         
548         while(1) {
549                 /* Stick ourself on the wait queue */
550                 set_current_state(TASK_INTERRUPTIBLE);
551                 add_wait_queue(&FlagSleepRec, &wait);
552                 
553                 /* Scan each board, looking for one which has a packet for us */
554                 for (i=0; i < MAX_BOARD; i++) {
555                         if (!apbs[i].RamIO)
556                                 continue;
557                         spin_lock_irqsave(&apbs[i].mutex, flags);
558                         
559                         tmp = readb(apbs[i].RamIO + DATA_TO_PC_READY);
560                         
561                         if (tmp == 2) {
562                                 struct st_ram_io st_loc;
563                                 struct mailbox mailbox;
564
565                                 /* Got a packet for us */
566                                 ret = do_ac_read(i, buf, &st_loc, &mailbox);
567                                 spin_unlock_irqrestore(&apbs[i].mutex, flags);
568                                 set_current_state(TASK_RUNNING);
569                                 remove_wait_queue(&FlagSleepRec, &wait);
570
571                                 if (copy_to_user(buf, &st_loc, sizeof(st_loc)))
572                                         return -EFAULT;
573                                 if (copy_to_user(buf + sizeof(st_loc), &mailbox, sizeof(mailbox)))
574                                         return -EFAULT;
575                                 return tmp;
576                         }
577                         
578                         if (tmp > 2) {
579                                 /* Got an error */
580                                 Dummy = readb(apbs[i].RamIO + VERS);
581                                 
582                                 spin_unlock_irqrestore(&apbs[i].mutex, flags);
583                                 set_current_state(TASK_RUNNING);
584                                 remove_wait_queue(&FlagSleepRec, &wait);
585                                 
586                                 printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n",
587                                        i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
588                                 DeviceErrorCount++;
589                                 return -EIO;
590                         }
591                         
592                         /* Nothing for us. Try the next board */
593                         Dummy = readb(apbs[i].RamIO + VERS);
594                         spin_unlock_irqrestore(&apbs[i].mutex, flags);
595                         
596                 } /* per board */
597
598                 /* OK - No boards had data for us. Sleep now */
599
600                 schedule();
601                 remove_wait_queue(&FlagSleepRec, &wait);
602
603                 if (signal_pending(current))
604                         return -EINTR;
605
606 #ifdef DEBUG
607                 if (loopcount++ > 2) {
608                         printk(KERN_DEBUG "Looping in ac_read. loopcount %d\n", loopcount);
609                 }
610 #endif
611         } 
612 }
613
614 static irqreturn_t ac_interrupt(int vec, void *dev_instance)
615 {
616         unsigned int i;
617         unsigned int FlagInt;
618         unsigned int LoopCount;
619         int handled = 0;
620
621         //    printk("Applicom interrupt on IRQ %d occurred\n", vec);
622
623         LoopCount = 0;
624
625         do {
626                 FlagInt = 0;
627                 for (i = 0; i < MAX_BOARD; i++) {
628                         
629                         /* Skip if this board doesn't exist */
630                         if (!apbs[i].RamIO)
631                                 continue;
632
633                         spin_lock(&apbs[i].mutex);
634
635                         /* Skip if this board doesn't want attention */
636                         if(readb(apbs[i].RamIO + RAM_IT_TO_PC) == 0) {
637                                 spin_unlock(&apbs[i].mutex);
638                                 continue;
639                         }
640
641                         handled = 1;
642                         FlagInt = 1;
643                         writeb(0, apbs[i].RamIO + RAM_IT_TO_PC);
644
645                         if (readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2) {
646                                 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n",
647                                        i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
648                                 DeviceErrorCount++;
649                         }
650
651                         if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) && 
652                            (readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) {
653                                 
654                                 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n",
655                                        i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY));
656                                 DeviceErrorCount++;
657                         }
658
659                         if (readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2) {     /* mailbox sent by the card ?   */
660                                 if (waitqueue_active(&FlagSleepRec)) {
661                                 wake_up_interruptible(&FlagSleepRec);
662                         }
663                         }
664
665                         if (readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0) {   /* ram i/o free for write by pc ? */
666                                 if (waitqueue_active(&apbs[i].FlagSleepSend)) { /* process sleep during read ?    */
667                                         wake_up_interruptible(&apbs[i].FlagSleepSend);
668                                 }
669                         }
670                         Dummy = readb(apbs[i].RamIO + VERS);
671
672                         if(readb(apbs[i].RamIO + RAM_IT_TO_PC)) {
673                                 /* There's another int waiting on this card */
674                                 spin_unlock(&apbs[i].mutex);
675                                 i--;
676                         } else {
677                                 spin_unlock(&apbs[i].mutex);
678                         }
679                 }
680                 if (FlagInt)
681                         LoopCount = 0;
682                 else
683                         LoopCount++;
684         } while(LoopCount < 2);
685         return IRQ_RETVAL(handled);
686 }
687
688
689
690 static int ac_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
691      
692 {                               /* @ ADG ou ATO selon le cas */
693         int i;
694         unsigned char IndexCard;
695         void __iomem *pmem;
696         int ret = 0;
697         volatile unsigned char byte_reset_it;
698         struct st_ram_io *adgl;
699         void __user *argp = (void __user *)arg;
700
701         /* In general, the device is only openable by root anyway, so we're not
702            particularly concerned that bogus ioctls can flood the console. */
703
704         adgl = kmalloc(sizeof(struct st_ram_io), GFP_KERNEL);
705         if (!adgl)
706                 return -ENOMEM;
707
708         if (copy_from_user(adgl, argp, sizeof(struct st_ram_io))) {
709                 kfree(adgl);
710                 return -EFAULT;
711         }
712         
713         IndexCard = adgl->num_card-1;
714          
715         if(cmd != 6 && ((IndexCard >= MAX_BOARD) || !apbs[IndexCard].RamIO)) {
716                 static int warncount = 10;
717                 if (warncount) {
718                         printk( KERN_WARNING "APPLICOM driver IOCTL, bad board number %d\n",(int)IndexCard+1);
719                         warncount--;
720                 }
721                 kfree(adgl);
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[IndexCard].RamIO + VERS) >> 4),
807                                (int)(readb(apbs[IndexCard].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         return 0;
840 }
841