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SLOW_WORK: Allow a requeueable work item to sleep till the thread is needed
[linux-2.6/linux-2.6-openrd.git] / drivers / char / applicom.c
blobfe2cb2f5db17281cd98eeb55a53867445cba0a00
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/sched.h>
27 #include <linux/slab.h>
28 #include <linux/errno.h>
29 #include <linux/miscdevice.h>
30 #include <linux/pci.h>
31 #include <linux/wait.h>
32 #include <linux/init.h>
33 #include <linux/fs.h>
34
35 #include <asm/io.h>
36 #include <asm/uaccess.h>
37
38 #include "applicom.h"
39
40
41 /* NOTE: We use for loops with {write,read}b() instead of
42 memcpy_{from,to}io throughout this driver. This is because
43 the board doesn't correctly handle word accesses - only
44 bytes.
45 */
46
47
48 #undef DEBUG
49
50 #define MAX_BOARD 8 /* maximum of pc board possible */
51 #define MAX_ISA_BOARD 4
52 #define LEN_RAM_IO 0x800
53 #define AC_MINOR 157
54
55 #ifndef PCI_VENDOR_ID_APPLICOM
56 #define PCI_VENDOR_ID_APPLICOM 0x1389
57 #define PCI_DEVICE_ID_APPLICOM_PCIGENERIC 0x0001
58 #define PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN 0x0002
59 #define PCI_DEVICE_ID_APPLICOM_PCI2000PFB 0x0003
60 #endif
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_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCIGENERIC) },
70 { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN) },
71 { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000PFB) },
72 { 0 }
73 };
74 MODULE_DEVICE_TABLE(pci, applicom_pci_tbl);
75
76 MODULE_AUTHOR("David Woodhouse & Applicom International");
77 MODULE_DESCRIPTION("Driver for Applicom Profibus card");
78 MODULE_LICENSE("GPL");
79 MODULE_ALIAS_MISCDEV(AC_MINOR);
80
81 MODULE_SUPPORTED_DEVICE("ac");
82
83
84 static struct applicom_board {
85 unsigned long PhysIO;
86 void __iomem *RamIO;
87 wait_queue_head_t FlagSleepSend;
88 long irq;
89 spinlock_t mutex;
90 } apbs[MAX_BOARD];
91
92 static unsigned int irq = 0; /* interrupt number IRQ */
93 static unsigned long mem = 0; /* physical segment of board */
94
95 module_param(irq, uint, 0);
96 MODULE_PARM_DESC(irq, "IRQ of the Applicom board");
97 module_param(mem, ulong, 0);
98 MODULE_PARM_DESC(mem, "Shared Memory Address of Applicom board");
99
100 static unsigned int numboards; /* number of installed boards */
101 static volatile unsigned char Dummy;
102 static DECLARE_WAIT_QUEUE_HEAD(FlagSleepRec);
103 static unsigned int WriteErrorCount; /* number of write error */
104 static unsigned int ReadErrorCount; /* number of read error */
105 static unsigned int DeviceErrorCount; /* number of device error */
106
107 static ssize_t ac_read (struct file *, char __user *, size_t, loff_t *);
108 static ssize_t ac_write (struct file *, const char __user *, size_t, loff_t *);
109 static int ac_ioctl(struct inode *, struct file *, unsigned int,
110 unsigned long);
111 static irqreturn_t ac_interrupt(int, void *);
112
113 static const struct file_operations ac_fops = {
114 .owner = THIS_MODULE,
115 .llseek = no_llseek,
116 .read = ac_read,
117 .write = ac_write,
118 .ioctl = ac_ioctl,
119 };
120
121 static struct miscdevice ac_miscdev = {
122 AC_MINOR,
123 "ac",
124 &ac_fops
125 };
126
127 static int dummy; /* dev_id for request_irq() */
128
129 static int ac_register_board(unsigned long physloc, void __iomem *loc,
130 unsigned char boardno)
131 {
132 volatile unsigned char byte_reset_it;
133
134 if((readb(loc + CONF_END_TEST) != 0x00) ||
135 (readb(loc + CONF_END_TEST + 1) != 0x55) ||
136 (readb(loc + CONF_END_TEST + 2) != 0xAA) ||
137 (readb(loc + CONF_END_TEST + 3) != 0xFF))
138 return 0;
139
140 if (!boardno)
141 boardno = readb(loc + NUMCARD_OWNER_TO_PC);
142
143 if (!boardno || boardno > MAX_BOARD) {
144 printk(KERN_WARNING "Board #%d (at 0x%lx) is out of range (1 <= x <= %d).\n",
145 boardno, physloc, MAX_BOARD);
146 return 0;
147 }
148
149 if (apbs[boardno - 1].RamIO) {
150 printk(KERN_WARNING "Board #%d (at 0x%lx) conflicts with previous board #%d (at 0x%lx)\n",
151 boardno, physloc, boardno, apbs[boardno-1].PhysIO);
152 return 0;
153 }
154
155 boardno--;
156
157 apbs[boardno].PhysIO = physloc;
158 apbs[boardno].RamIO = loc;
159 init_waitqueue_head(&apbs[boardno].FlagSleepSend);
160 spin_lock_init(&apbs[boardno].mutex);
161 byte_reset_it = readb(loc + RAM_IT_TO_PC);
162
163 numboards++;
164 return boardno + 1;
165 }
166
167 static void __exit applicom_exit(void)
168 {
169 unsigned int i;
170
171 misc_deregister(&ac_miscdev);
172
173 for (i = 0; i < MAX_BOARD; i++) {
174
175 if (!apbs[i].RamIO)
176 continue;
177
178 if (apbs[i].irq)
179 free_irq(apbs[i].irq, &dummy);
180
181 iounmap(apbs[i].RamIO);
182 }
183 }
184
185 static int __init applicom_init(void)
186 {
187 int i, numisa = 0;
188 struct pci_dev *dev = NULL;
189 void __iomem *RamIO;
190 int boardno, ret;
191
192 printk(KERN_INFO "Applicom driver: $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $\n");
193
194 /* No mem and irq given - check for a PCI card */
195
196 while ( (dev = pci_get_class(PCI_CLASS_OTHERS << 16, dev))) {
197
198 if (!pci_match_id(applicom_pci_tbl, dev))
199 continue;
200
201 if (pci_enable_device(dev))
202 return -EIO;
203
204 RamIO = ioremap_nocache(pci_resource_start(dev, 0), LEN_RAM_IO);
205
206 if (!RamIO) {
207 printk(KERN_INFO "ac.o: Failed to ioremap PCI memory "
208 "space at 0x%llx\n",
209 (unsigned long long)pci_resource_start(dev, 0));
210 pci_disable_device(dev);
211 return -EIO;
212 }
213
214 printk(KERN_INFO "Applicom %s found at mem 0x%llx, irq %d\n",
215 applicom_pci_devnames[dev->device-1],
216 (unsigned long long)pci_resource_start(dev, 0),
217 dev->irq);
218
219 boardno = ac_register_board(pci_resource_start(dev, 0),
220 RamIO, 0);
221 if (!boardno) {
222 printk(KERN_INFO "ac.o: PCI Applicom device doesn't have correct signature.\n");
223 iounmap(RamIO);
224 pci_disable_device(dev);
225 continue;
226 }
227
228 if (request_irq(dev->irq, &ac_interrupt, IRQF_SHARED, "Applicom PCI", &dummy)) {
229 printk(KERN_INFO "Could not allocate IRQ %d for PCI Applicom device.\n", dev->irq);
230 iounmap(RamIO);
231 pci_disable_device(dev);
232 apbs[boardno - 1].RamIO = NULL;
233 continue;
234 }
235
236 /* Enable interrupts. */
237
238 writeb(0x40, apbs[boardno - 1].RamIO + RAM_IT_FROM_PC);
239
240 apbs[boardno - 1].irq = dev->irq;
241 }
242
243 /* Finished with PCI cards. If none registered,
244 * and there was no mem/irq specified, exit */
245
246 if (!mem || !irq) {
247 if (numboards)
248 goto fin;
249 else {
250 printk(KERN_INFO "ac.o: No PCI boards found.\n");
251 printk(KERN_INFO "ac.o: For an ISA board you must supply memory and irq parameters.\n");
252 return -ENXIO;
253 }
254 }
255
256 /* Now try the specified ISA cards */
257
258 for (i = 0; i < MAX_ISA_BOARD; i++) {
259 RamIO = ioremap_nocache(mem + (LEN_RAM_IO * i), LEN_RAM_IO);
260
261 if (!RamIO) {
262 printk(KERN_INFO "ac.o: Failed to ioremap the ISA card's memory space (slot #%d)\n", i + 1);
263 continue;
264 }
265
266 if (!(boardno = ac_register_board((unsigned long)mem+ (LEN_RAM_IO*i),
267 RamIO,i+1))) {
268 iounmap(RamIO);
269 continue;
270 }
271
272 printk(KERN_NOTICE "Applicom ISA card found at mem 0x%lx, irq %d\n", mem + (LEN_RAM_IO*i), irq);
273
274 if (!numisa) {
275 if (request_irq(irq, &ac_interrupt, IRQF_SHARED, "Applicom ISA", &dummy)) {
276 printk(KERN_WARNING "Could not allocate IRQ %d for ISA Applicom device.\n", irq);
277 iounmap(RamIO);
278 apbs[boardno - 1].RamIO = NULL;
279 }
280 else
281 apbs[boardno - 1].irq = irq;
282 }
283 else
284 apbs[boardno - 1].irq = 0;
285
286 numisa++;
287 }
288
289 if (!numisa)
290 printk(KERN_WARNING "ac.o: No valid ISA Applicom boards found "
291 "at mem 0x%lx\n", mem);
292
293 fin:
294 init_waitqueue_head(&FlagSleepRec);
295
296 WriteErrorCount = 0;
297 ReadErrorCount = 0;
298 DeviceErrorCount = 0;
299
300 if (numboards) {
301 ret = misc_register(&ac_miscdev);
302 if (ret) {
303 printk(KERN_WARNING "ac.o: Unable to register misc device\n");
304 goto out;
305 }
306 for (i = 0; i < MAX_BOARD; i++) {
307 int serial;
308 char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
309
310 if (!apbs[i].RamIO)
311 continue;
312
313 for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
314 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
315
316 boardname[serial] = 0;
317
318
319 printk(KERN_INFO "Applicom board %d: %s, PROM V%d.%d",
320 i+1, boardname,
321 (int)(readb(apbs[i].RamIO + VERS) >> 4),
322 (int)(readb(apbs[i].RamIO + VERS) & 0xF));
323
324 serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) +
325 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) +
326 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
327
328 if (serial != 0)
329 printk(" S/N %d\n", serial);
330 else
331 printk("\n");
332 }
333 return 0;
334 }
335
336 else
337 return -ENXIO;
338
339 out:
340 for (i = 0; i < MAX_BOARD; i++) {
341 if (!apbs[i].RamIO)
342 continue;
343 if (apbs[i].irq)
344 free_irq(apbs[i].irq, &dummy);
345 iounmap(apbs[i].RamIO);
346 }
347 pci_disable_device(dev);
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 ret = do_ac_read(i, buf, &st_loc, &mailbox);
569 spin_unlock_irqrestore(&apbs[i].mutex, flags);
570 set_current_state(TASK_RUNNING);
571 remove_wait_queue(&FlagSleepRec, &wait);
572
573 if (copy_to_user(buf, &st_loc, sizeof(st_loc)))
574 return -EFAULT;
575 if (copy_to_user(buf + sizeof(st_loc), &mailbox, sizeof(mailbox)))
576 return -EFAULT;
577 return tmp;
578 }
579
580 if (tmp > 2) {
581 /* Got an error */
582 Dummy = readb(apbs[i].RamIO + VERS);
583
584 spin_unlock_irqrestore(&apbs[i].mutex, flags);
585 set_current_state(TASK_RUNNING);
586 remove_wait_queue(&FlagSleepRec, &wait);
587
588 printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n",
589 i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
590 DeviceErrorCount++;
591 return -EIO;
592 }
593
594 /* Nothing for us. Try the next board */
595 Dummy = readb(apbs[i].RamIO + VERS);
596 spin_unlock_irqrestore(&apbs[i].mutex, flags);
597
598 } /* per board */
599
600 /* OK - No boards had data for us. Sleep now */
601
602 schedule();
603 remove_wait_queue(&FlagSleepRec, &wait);
604
605 if (signal_pending(current))
606 return -EINTR;
607
608 #ifdef DEBUG
609 if (loopcount++ > 2) {
610 printk(KERN_DEBUG "Looping in ac_read. loopcount %d\n", loopcount);
611 }
612 #endif
613 }
614 }
615
616 static irqreturn_t ac_interrupt(int vec, void *dev_instance)
617 {
618 unsigned int i;
619 unsigned int FlagInt;
620 unsigned int LoopCount;
621 int handled = 0;
622
623 // printk("Applicom interrupt on IRQ %d occurred\n", vec);
624
625 LoopCount = 0;
626
627 do {
628 FlagInt = 0;
629 for (i = 0; i < MAX_BOARD; i++) {
630
631 /* Skip if this board doesn't exist */
632 if (!apbs[i].RamIO)
633 continue;
634
635 spin_lock(&apbs[i].mutex);
636
637 /* Skip if this board doesn't want attention */
638 if(readb(apbs[i].RamIO + RAM_IT_TO_PC) == 0) {
639 spin_unlock(&apbs[i].mutex);
640 continue;
641 }
642
643 handled = 1;
644 FlagInt = 1;
645 writeb(0, apbs[i].RamIO + RAM_IT_TO_PC);
646
647 if (readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2) {
648 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n",
649 i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
650 DeviceErrorCount++;
651 }
652
653 if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) &&
654 (readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) {
655
656 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n",
657 i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY));
658 DeviceErrorCount++;
659 }
660
661 if (readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2) { /* mailbox sent by the card ? */
662 if (waitqueue_active(&FlagSleepRec)) {
663 wake_up_interruptible(&FlagSleepRec);
664 }
665 }
666
667 if (readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0) { /* ram i/o free for write by pc ? */
668 if (waitqueue_active(&apbs[i].FlagSleepSend)) { /* process sleep during read ? */
669 wake_up_interruptible(&apbs[i].FlagSleepSend);
670 }
671 }
672 Dummy = readb(apbs[i].RamIO + VERS);
673
674 if(readb(apbs[i].RamIO + RAM_IT_TO_PC)) {
675 /* There's another int waiting on this card */
676 spin_unlock(&apbs[i].mutex);
677 i--;
678 } else {
679 spin_unlock(&apbs[i].mutex);
680 }
681 }
682 if (FlagInt)
683 LoopCount = 0;
684 else
685 LoopCount++;
686 } while(LoopCount < 2);
687 return IRQ_RETVAL(handled);
688 }
689
690
691
692 static int ac_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
693
694 { /* @ ADG ou ATO selon le cas */
695 int i;
696 unsigned char IndexCard;
697 void __iomem *pmem;
698 int ret = 0;
699 volatile unsigned char byte_reset_it;
700 struct st_ram_io *adgl;
701 void __user *argp = (void __user *)arg;
702
703 /* In general, the device is only openable by root anyway, so we're not
704 particularly concerned that bogus ioctls can flood the console. */
705
706 adgl = kmalloc(sizeof(struct st_ram_io), GFP_KERNEL);
707 if (!adgl)
708 return -ENOMEM;
709
710 if (copy_from_user(adgl, argp, sizeof(struct st_ram_io))) {
711 kfree(adgl);
712 return -EFAULT;
713 }
714
715 IndexCard = adgl->num_card-1;
716
717 if(cmd != 6 && ((IndexCard >= MAX_BOARD) || !apbs[IndexCard].RamIO)) {
718 static int warncount = 10;
719 if (warncount) {
720 printk( KERN_WARNING "APPLICOM driver IOCTL, bad board number %d\n",(int)IndexCard+1);
721 warncount--;
722 }
723 kfree(adgl);
724 return -EINVAL;
725 }
726
727 switch (cmd) {
728
729 case 0:
730 pmem = apbs[IndexCard].RamIO;
731 for (i = 0; i < sizeof(struct st_ram_io); i++)
732 ((unsigned char *)adgl)[i]=readb(pmem++);
733 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
734 ret = -EFAULT;
735 break;
736 case 1:
737 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
738 for (i = 0; i < 4; i++)
739 adgl->conf_end_test[i] = readb(pmem++);
740 for (i = 0; i < 2; i++)
741 adgl->error_code[i] = readb(pmem++);
742 for (i = 0; i < 4; i++)
743 adgl->parameter_error[i] = readb(pmem++);
744 pmem = apbs[IndexCard].RamIO + VERS;
745 adgl->vers = readb(pmem);
746 pmem = apbs[IndexCard].RamIO + TYPE_CARD;
747 for (i = 0; i < 20; i++)
748 adgl->reserv1[i] = readb(pmem++);
749 *(int *)&adgl->reserv1[20] =
750 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) +
751 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) +
752 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) );
753
754 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
755 ret = -EFAULT;
756 break;
757 case 2:
758 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
759 for (i = 0; i < 10; i++)
760 writeb(0xff, pmem++);
761 writeb(adgl->data_from_pc_ready,
762 apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
763
764 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
765
766 for (i = 0; i < MAX_BOARD; i++) {
767 if (apbs[i].RamIO) {
768 byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC);
769 }
770 }
771 break;
772 case 3:
773 pmem = apbs[IndexCard].RamIO + TIC_DES_FROM_PC;
774 writeb(adgl->tic_des_from_pc, pmem);
775 break;
776 case 4:
777 pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC;
778 adgl->tic_owner_to_pc = readb(pmem++);
779 adgl->numcard_owner_to_pc = readb(pmem);
780 if (copy_to_user(argp, adgl,sizeof(struct st_ram_io)))
781 ret = -EFAULT;
782 break;
783 case 5:
784 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
785 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
786 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
787 writeb(4, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
788 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
789 break;
790 case 6:
791 printk(KERN_INFO "APPLICOM driver release .... V2.8.0 ($Revision: 1.30 $)\n");
792 printk(KERN_INFO "Number of installed boards . %d\n", (int) numboards);
793 printk(KERN_INFO "Segment of board ........... %X\n", (int) mem);
794 printk(KERN_INFO "Interrupt IRQ number ....... %d\n", (int) irq);
795 for (i = 0; i < MAX_BOARD; i++) {
796 int serial;
797 char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
798
799 if (!apbs[i].RamIO)
800 continue;
801
802 for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
803 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
804 boardname[serial] = 0;
805
806 printk(KERN_INFO "Prom version board %d ....... V%d.%d %s",
807 i+1,
808 (int)(readb(apbs[IndexCard].RamIO + VERS) >> 4),
809 (int)(readb(apbs[IndexCard].RamIO + VERS) & 0xF),
810 boardname);
811
812
813 serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) +
814 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) +
815 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
816
817 if (serial != 0)
818 printk(" S/N %d\n", serial);
819 else
820 printk("\n");
821 }
822 if (DeviceErrorCount != 0)
823 printk(KERN_INFO "DeviceErrorCount ........... %d\n", DeviceErrorCount);
824 if (ReadErrorCount != 0)
825 printk(KERN_INFO "ReadErrorCount ............. %d\n", ReadErrorCount);
826 if (WriteErrorCount != 0)
827 printk(KERN_INFO "WriteErrorCount ............ %d\n", WriteErrorCount);
828 if (waitqueue_active(&FlagSleepRec))
829 printk(KERN_INFO "Process in read pending\n");
830 for (i = 0; i < MAX_BOARD; i++) {
831 if (apbs[i].RamIO && waitqueue_active(&apbs[i].FlagSleepSend))
832 printk(KERN_INFO "Process in write pending board %d\n",i+1);
833 }
834 break;
835 default:
836 ret = -ENOTTY;
837 break;
838 }
839 Dummy = readb(apbs[IndexCard].RamIO + VERS);
840 kfree(adgl);
841 return 0;
842 }
843
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