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PM / sleep: Asynchronous threads for suspend_noirq
[linux/fpc-iii.git] / drivers / char / applicom.c
blob974321a2508d861655d1883480a902476ccc7a58
1 /* Derived from Applicom driver ac.c for SCO Unix */
2 /* Ported by David Woodhouse, Axiom (Cambridge) Ltd. */
3 /* dwmw2@infradead.org 30/8/98 */
4 /* $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $ */
5 /* This module is for Linux 2.1 and 2.2 series kernels. */
6 /*****************************************************************************/
7 /* J PAGET 18/02/94 passage V2.4.2 ioctl avec code 2 reset to les interrupt */
8 /* ceci pour reseter correctement apres une sortie sauvage */
9 /* J PAGET 02/05/94 passage V2.4.3 dans le traitement de d'interruption, */
10 /* LoopCount n'etait pas initialise a 0. */
11 /* F LAFORSE 04/07/95 version V2.6.0 lecture bidon apres acces a une carte */
12 /* pour liberer le bus */
13 /* J.PAGET 19/11/95 version V2.6.1 Nombre, addresse,irq n'est plus configure */
14 /* et passe en argument a acinit, mais est scrute sur le bus pour s'adapter */
15 /* au nombre de cartes presentes sur le bus. IOCL code 6 affichait V2.4.3 */
16 /* F.LAFORSE 28/11/95 creation de fichiers acXX.o avec les differentes */
17 /* addresses de base des cartes, IOCTL 6 plus complet */
18 /* J.PAGET le 19/08/96 copie de la version V2.6 en V2.8.0 sans modification */
19 /* de code autre que le texte V2.6.1 en V2.8.0 */
20 /*****************************************************************************/
21
22
23 #include <linux/kernel.h>
24 #include <linux/module.h>
25 #include <linux/interrupt.h>
26 #include <linux/sched.h>
27 #include <linux/slab.h>
28 #include <linux/errno.h>
29 #include <linux/mutex.h>
30 #include <linux/miscdevice.h>
31 #include <linux/pci.h>
32 #include <linux/wait.h>
33 #include <linux/init.h>
34 #include <linux/fs.h>
35
36 #include <asm/io.h>
37 #include <asm/uaccess.h>
38
39 #include "applicom.h"
40
41
42 /* NOTE: We use for loops with {write,read}b() instead of
43 memcpy_{from,to}io throughout this driver. This is because
44 the board doesn't correctly handle word accesses - only
45 bytes.
46 */
47
48
49 #undef DEBUG
50
51 #define MAX_BOARD 8 /* maximum of pc board possible */
52 #define MAX_ISA_BOARD 4
53 #define LEN_RAM_IO 0x800
54 #define AC_MINOR 157
55
56 #ifndef PCI_VENDOR_ID_APPLICOM
57 #define PCI_VENDOR_ID_APPLICOM 0x1389
58 #define PCI_DEVICE_ID_APPLICOM_PCIGENERIC 0x0001
59 #define PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN 0x0002
60 #define PCI_DEVICE_ID_APPLICOM_PCI2000PFB 0x0003
61 #endif
62
63 static DEFINE_MUTEX(ac_mutex);
64 static char *applicom_pci_devnames[] = {
65 "PCI board",
66 "PCI2000IBS / PCI2000CAN",
67 "PCI2000PFB"
68 };
69
70 static struct pci_device_id applicom_pci_tbl[] = {
71 { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCIGENERIC) },
72 { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN) },
73 { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000PFB) },
74 { 0 }
75 };
76 MODULE_DEVICE_TABLE(pci, applicom_pci_tbl);
77
78 MODULE_AUTHOR("David Woodhouse & Applicom International");
79 MODULE_DESCRIPTION("Driver for Applicom Profibus card");
80 MODULE_LICENSE("GPL");
81 MODULE_ALIAS_MISCDEV(AC_MINOR);
82
83 MODULE_SUPPORTED_DEVICE("ac");
84
85
86 static struct applicom_board {
87 unsigned long PhysIO;
88 void __iomem *RamIO;
89 wait_queue_head_t FlagSleepSend;
90 long irq;
91 spinlock_t mutex;
92 } apbs[MAX_BOARD];
93
94 static unsigned int irq = 0; /* interrupt number IRQ */
95 static unsigned long mem = 0; /* physical segment of board */
96
97 module_param(irq, uint, 0);
98 MODULE_PARM_DESC(irq, "IRQ of the Applicom board");
99 module_param(mem, ulong, 0);
100 MODULE_PARM_DESC(mem, "Shared Memory Address of Applicom board");
101
102 static unsigned int numboards; /* number of installed boards */
103 static volatile unsigned char Dummy;
104 static DECLARE_WAIT_QUEUE_HEAD(FlagSleepRec);
105 static unsigned int WriteErrorCount; /* number of write error */
106 static unsigned int ReadErrorCount; /* number of read error */
107 static unsigned int DeviceErrorCount; /* number of device error */
108
109 static ssize_t ac_read (struct file *, char __user *, size_t, loff_t *);
110 static ssize_t ac_write (struct file *, const char __user *, size_t, loff_t *);
111 static long ac_ioctl(struct file *, unsigned int, unsigned long);
112 static irqreturn_t ac_interrupt(int, void *);
113
114 static const struct file_operations ac_fops = {
115 .owner = THIS_MODULE,
116 .llseek = no_llseek,
117 .read = ac_read,
118 .write = ac_write,
119 .unlocked_ioctl = ac_ioctl,
120 };
121
122 static struct miscdevice ac_miscdev = {
123 AC_MINOR,
124 "ac",
125 &ac_fops
126 };
127
128 static int dummy; /* dev_id for request_irq() */
129
130 static int ac_register_board(unsigned long physloc, void __iomem *loc,
131 unsigned char boardno)
132 {
133 volatile unsigned char byte_reset_it;
134
135 if((readb(loc + CONF_END_TEST) != 0x00) ||
136 (readb(loc + CONF_END_TEST + 1) != 0x55) ||
137 (readb(loc + CONF_END_TEST + 2) != 0xAA) ||
138 (readb(loc + CONF_END_TEST + 3) != 0xFF))
139 return 0;
140
141 if (!boardno)
142 boardno = readb(loc + NUMCARD_OWNER_TO_PC);
143
144 if (!boardno || boardno > MAX_BOARD) {
145 printk(KERN_WARNING "Board #%d (at 0x%lx) is out of range (1 <= x <= %d).\n",
146 boardno, physloc, MAX_BOARD);
147 return 0;
148 }
149
150 if (apbs[boardno - 1].RamIO) {
151 printk(KERN_WARNING "Board #%d (at 0x%lx) conflicts with previous board #%d (at 0x%lx)\n",
152 boardno, physloc, boardno, apbs[boardno-1].PhysIO);
153 return 0;
154 }
155
156 boardno--;
157
158 apbs[boardno].PhysIO = physloc;
159 apbs[boardno].RamIO = loc;
160 init_waitqueue_head(&apbs[boardno].FlagSleepSend);
161 spin_lock_init(&apbs[boardno].mutex);
162 byte_reset_it = readb(loc + RAM_IT_TO_PC);
163
164 numboards++;
165 return boardno + 1;
166 }
167
168 static void __exit applicom_exit(void)
169 {
170 unsigned int i;
171
172 misc_deregister(&ac_miscdev);
173
174 for (i = 0; i < MAX_BOARD; i++) {
175
176 if (!apbs[i].RamIO)
177 continue;
178
179 if (apbs[i].irq)
180 free_irq(apbs[i].irq, &dummy);
181
182 iounmap(apbs[i].RamIO);
183 }
184 }
185
186 static int __init applicom_init(void)
187 {
188 int i, numisa = 0;
189 struct pci_dev *dev = NULL;
190 void __iomem *RamIO;
191 int boardno, ret;
192
193 printk(KERN_INFO "Applicom driver: $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $\n");
194
195 /* No mem and irq given - check for a PCI card */
196
197 while ( (dev = pci_get_class(PCI_CLASS_OTHERS << 16, dev))) {
198
199 if (!pci_match_id(applicom_pci_tbl, dev))
200 continue;
201
202 if (pci_enable_device(dev))
203 return -EIO;
204
205 RamIO = ioremap_nocache(pci_resource_start(dev, 0), LEN_RAM_IO);
206
207 if (!RamIO) {
208 printk(KERN_INFO "ac.o: Failed to ioremap PCI memory "
209 "space at 0x%llx\n",
210 (unsigned long long)pci_resource_start(dev, 0));
211 pci_disable_device(dev);
212 return -EIO;
213 }
214
215 printk(KERN_INFO "Applicom %s found at mem 0x%llx, irq %d\n",
216 applicom_pci_devnames[dev->device-1],
217 (unsigned long long)pci_resource_start(dev, 0),
218 dev->irq);
219
220 boardno = ac_register_board(pci_resource_start(dev, 0),
221 RamIO, 0);
222 if (!boardno) {
223 printk(KERN_INFO "ac.o: PCI Applicom device doesn't have correct signature.\n");
224 iounmap(RamIO);
225 pci_disable_device(dev);
226 continue;
227 }
228
229 if (request_irq(dev->irq, &ac_interrupt, IRQF_SHARED, "Applicom PCI", &dummy)) {
230 printk(KERN_INFO "Could not allocate IRQ %d for PCI Applicom device.\n", dev->irq);
231 iounmap(RamIO);
232 pci_disable_device(dev);
233 apbs[boardno - 1].RamIO = NULL;
234 continue;
235 }
236
237 /* Enable interrupts. */
238
239 writeb(0x40, apbs[boardno - 1].RamIO + RAM_IT_FROM_PC);
240
241 apbs[boardno - 1].irq = dev->irq;
242 }
243
244 /* Finished with PCI cards. If none registered,
245 * and there was no mem/irq specified, exit */
246
247 if (!mem || !irq) {
248 if (numboards)
249 goto fin;
250 else {
251 printk(KERN_INFO "ac.o: No PCI boards found.\n");
252 printk(KERN_INFO "ac.o: For an ISA board you must supply memory and irq parameters.\n");
253 return -ENXIO;
254 }
255 }
256
257 /* Now try the specified ISA cards */
258
259 for (i = 0; i < MAX_ISA_BOARD; i++) {
260 RamIO = ioremap_nocache(mem + (LEN_RAM_IO * i), LEN_RAM_IO);
261
262 if (!RamIO) {
263 printk(KERN_INFO "ac.o: Failed to ioremap the ISA card's memory space (slot #%d)\n", i + 1);
264 continue;
265 }
266
267 if (!(boardno = ac_register_board((unsigned long)mem+ (LEN_RAM_IO*i),
268 RamIO,i+1))) {
269 iounmap(RamIO);
270 continue;
271 }
272
273 printk(KERN_NOTICE "Applicom ISA card found at mem 0x%lx, irq %d\n", mem + (LEN_RAM_IO*i), irq);
274
275 if (!numisa) {
276 if (request_irq(irq, &ac_interrupt, IRQF_SHARED, "Applicom ISA", &dummy)) {
277 printk(KERN_WARNING "Could not allocate IRQ %d for ISA Applicom device.\n", irq);
278 iounmap(RamIO);
279 apbs[boardno - 1].RamIO = NULL;
280 }
281 else
282 apbs[boardno - 1].irq = irq;
283 }
284 else
285 apbs[boardno - 1].irq = 0;
286
287 numisa++;
288 }
289
290 if (!numisa)
291 printk(KERN_WARNING "ac.o: No valid ISA Applicom boards found "
292 "at mem 0x%lx\n", mem);
293
294 fin:
295 init_waitqueue_head(&FlagSleepRec);
296
297 WriteErrorCount = 0;
298 ReadErrorCount = 0;
299 DeviceErrorCount = 0;
300
301 if (numboards) {
302 ret = misc_register(&ac_miscdev);
303 if (ret) {
304 printk(KERN_WARNING "ac.o: Unable to register misc device\n");
305 goto out;
306 }
307 for (i = 0; i < MAX_BOARD; i++) {
308 int serial;
309 char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
310
311 if (!apbs[i].RamIO)
312 continue;
313
314 for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
315 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
316
317 boardname[serial] = 0;
318
319
320 printk(KERN_INFO "Applicom board %d: %s, PROM V%d.%d",
321 i+1, boardname,
322 (int)(readb(apbs[i].RamIO + VERS) >> 4),
323 (int)(readb(apbs[i].RamIO + VERS) & 0xF));
324
325 serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) +
326 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) +
327 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
328
329 if (serial != 0)
330 printk(" S/N %d\n", serial);
331 else
332 printk("\n");
333 }
334 return 0;
335 }
336
337 else
338 return -ENXIO;
339
340 out:
341 for (i = 0; i < MAX_BOARD; i++) {
342 if (!apbs[i].RamIO)
343 continue;
344 if (apbs[i].irq)
345 free_irq(apbs[i].irq, &dummy);
346 iounmap(apbs[i].RamIO);
347 }
348 pci_disable_device(dev);
349 return ret;
350 }
351
352 module_init(applicom_init);
353 module_exit(applicom_exit);
354
355
356 static ssize_t ac_write(struct file *file, const char __user *buf, size_t count, loff_t * ppos)
357 {
358 unsigned int NumCard; /* Board number 1 -> 8 */
359 unsigned int IndexCard; /* Index board number 0 -> 7 */
360 unsigned char TicCard; /* Board TIC to send */
361 unsigned long flags; /* Current priority */
362 struct st_ram_io st_loc;
363 struct mailbox tmpmailbox;
364 #ifdef DEBUG
365 int c;
366 #endif
367 DECLARE_WAITQUEUE(wait, current);
368
369 if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
370 static int warncount = 5;
371 if (warncount) {
372 printk(KERN_INFO "Hmmm. write() of Applicom card, length %zd != expected %zd\n",
373 count, sizeof(struct st_ram_io) + sizeof(struct mailbox));
374 warncount--;
375 }
376 return -EINVAL;
377 }
378
379 if(copy_from_user(&st_loc, buf, sizeof(struct st_ram_io)))
380 return -EFAULT;
381
382 if(copy_from_user(&tmpmailbox, &buf[sizeof(struct st_ram_io)],
383 sizeof(struct mailbox)))
384 return -EFAULT;
385
386 NumCard = st_loc.num_card; /* board number to send */
387 TicCard = st_loc.tic_des_from_pc; /* tic number to send */
388 IndexCard = NumCard - 1;
389
390 if((NumCard < 1) || (NumCard > MAX_BOARD) || !apbs[IndexCard].RamIO)
391 return -EINVAL;
392
393 #ifdef DEBUG
394 printk("Write to applicom card #%d. struct st_ram_io follows:",
395 IndexCard+1);
396
397 for (c = 0; c < sizeof(struct st_ram_io);) {
398
399 printk("\n%5.5X: %2.2X", c, ((unsigned char *) &st_loc)[c]);
400
401 for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
402 printk(" %2.2X", ((unsigned char *) &st_loc)[c]);
403 }
404 }
405
406 printk("\nstruct mailbox follows:");
407
408 for (c = 0; c < sizeof(struct mailbox);) {
409 printk("\n%5.5X: %2.2X", c, ((unsigned char *) &tmpmailbox)[c]);
410
411 for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
412 printk(" %2.2X", ((unsigned char *) &tmpmailbox)[c]);
413 }
414 }
415
416 printk("\n");
417 #endif
418
419 spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
420
421 /* Test octet ready correct */
422 if(readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) > 2) {
423 Dummy = readb(apbs[IndexCard].RamIO + VERS);
424 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
425 printk(KERN_WARNING "APPLICOM driver write error board %d, DataFromPcReady = %d\n",
426 IndexCard,(int)readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY));
427 DeviceErrorCount++;
428 return -EIO;
429 }
430
431 /* Place ourselves on the wait queue */
432 set_current_state(TASK_INTERRUPTIBLE);
433 add_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
434
435 /* Check whether the card is ready for us */
436 while (readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) != 0) {
437 Dummy = readb(apbs[IndexCard].RamIO + VERS);
438 /* It's busy. Sleep. */
439
440 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
441 schedule();
442 if (signal_pending(current)) {
443 remove_wait_queue(&apbs[IndexCard].FlagSleepSend,
444 &wait);
445 return -EINTR;
446 }
447 spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
448 set_current_state(TASK_INTERRUPTIBLE);
449 }
450
451 /* We may not have actually slept */
452 set_current_state(TASK_RUNNING);
453 remove_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
454
455 writeb(1, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
456
457 /* Which is best - lock down the pages with rawio and then
458 copy directly, or use bounce buffers? For now we do the latter
459 because it works with 2.2 still */
460 {
461 unsigned char *from = (unsigned char *) &tmpmailbox;
462 void __iomem *to = apbs[IndexCard].RamIO + RAM_FROM_PC;
463 int c;
464
465 for (c = 0; c < sizeof(struct mailbox); c++)
466 writeb(*(from++), to++);
467 }
468
469 writeb(0x20, apbs[IndexCard].RamIO + TIC_OWNER_FROM_PC);
470 writeb(0xff, apbs[IndexCard].RamIO + NUMCARD_OWNER_FROM_PC);
471 writeb(TicCard, apbs[IndexCard].RamIO + TIC_DES_FROM_PC);
472 writeb(NumCard, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
473 writeb(2, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
474 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
475 Dummy = readb(apbs[IndexCard].RamIO + VERS);
476 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
477 return 0;
478 }
479
480 static int do_ac_read(int IndexCard, char __user *buf,
481 struct st_ram_io *st_loc, struct mailbox *mailbox)
482 {
483 void __iomem *from = apbs[IndexCard].RamIO + RAM_TO_PC;
484 unsigned char *to = (unsigned char *)mailbox;
485 #ifdef DEBUG
486 int c;
487 #endif
488
489 st_loc->tic_owner_to_pc = readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC);
490 st_loc->numcard_owner_to_pc = readb(apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
491
492
493 {
494 int c;
495
496 for (c = 0; c < sizeof(struct mailbox); c++)
497 *(to++) = readb(from++);
498 }
499 writeb(1, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
500 writeb(1, apbs[IndexCard].RamIO + TYP_ACK_FROM_PC);
501 writeb(IndexCard+1, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
502 writeb(readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC),
503 apbs[IndexCard].RamIO + TIC_ACK_FROM_PC);
504 writeb(2, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
505 writeb(0, apbs[IndexCard].RamIO + DATA_TO_PC_READY);
506 writeb(2, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
507 Dummy = readb(apbs[IndexCard].RamIO + VERS);
508
509 #ifdef DEBUG
510 printk("Read from applicom card #%d. struct st_ram_io follows:", NumCard);
511
512 for (c = 0; c < sizeof(struct st_ram_io);) {
513 printk("\n%5.5X: %2.2X", c, ((unsigned char *)st_loc)[c]);
514
515 for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
516 printk(" %2.2X", ((unsigned char *)st_loc)[c]);
517 }
518 }
519
520 printk("\nstruct mailbox follows:");
521
522 for (c = 0; c < sizeof(struct mailbox);) {
523 printk("\n%5.5X: %2.2X", c, ((unsigned char *)mailbox)[c]);
524
525 for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
526 printk(" %2.2X", ((unsigned char *)mailbox)[c]);
527 }
528 }
529 printk("\n");
530 #endif
531 return (sizeof(struct st_ram_io) + sizeof(struct mailbox));
532 }
533
534 static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_t *ptr)
535 {
536 unsigned long flags;
537 unsigned int i;
538 unsigned char tmp;
539 int ret = 0;
540 DECLARE_WAITQUEUE(wait, current);
541 #ifdef DEBUG
542 int loopcount=0;
543 #endif
544 /* No need to ratelimit this. Only root can trigger it anyway */
545 if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
546 printk( KERN_WARNING "Hmmm. read() of Applicom card, length %zd != expected %zd\n",
547 count,sizeof(struct st_ram_io) + sizeof(struct mailbox));
548 return -EINVAL;
549 }
550
551 while(1) {
552 /* Stick ourself on the wait queue */
553 set_current_state(TASK_INTERRUPTIBLE);
554 add_wait_queue(&FlagSleepRec, &wait);
555
556 /* Scan each board, looking for one which has a packet for us */
557 for (i=0; i < MAX_BOARD; i++) {
558 if (!apbs[i].RamIO)
559 continue;
560 spin_lock_irqsave(&apbs[i].mutex, flags);
561
562 tmp = readb(apbs[i].RamIO + DATA_TO_PC_READY);
563
564 if (tmp == 2) {
565 struct st_ram_io st_loc;
566 struct mailbox mailbox;
567
568 /* Got a packet for us */
569 memset(&st_loc, 0, sizeof(st_loc));
570 ret = do_ac_read(i, buf, &st_loc, &mailbox);
571 spin_unlock_irqrestore(&apbs[i].mutex, flags);
572 set_current_state(TASK_RUNNING);
573 remove_wait_queue(&FlagSleepRec, &wait);
574
575 if (copy_to_user(buf, &st_loc, sizeof(st_loc)))
576 return -EFAULT;
577 if (copy_to_user(buf + sizeof(st_loc), &mailbox, sizeof(mailbox)))
578 return -EFAULT;
579 return tmp;
580 }
581
582 if (tmp > 2) {
583 /* Got an error */
584 Dummy = readb(apbs[i].RamIO + VERS);
585
586 spin_unlock_irqrestore(&apbs[i].mutex, flags);
587 set_current_state(TASK_RUNNING);
588 remove_wait_queue(&FlagSleepRec, &wait);
589
590 printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n",
591 i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
592 DeviceErrorCount++;
593 return -EIO;
594 }
595
596 /* Nothing for us. Try the next board */
597 Dummy = readb(apbs[i].RamIO + VERS);
598 spin_unlock_irqrestore(&apbs[i].mutex, flags);
599
600 } /* per board */
601
602 /* OK - No boards had data for us. Sleep now */
603
604 schedule();
605 remove_wait_queue(&FlagSleepRec, &wait);
606
607 if (signal_pending(current))
608 return -EINTR;
609
610 #ifdef DEBUG
611 if (loopcount++ > 2) {
612 printk(KERN_DEBUG "Looping in ac_read. loopcount %d\n", loopcount);
613 }
614 #endif
615 }
616 }
617
618 static irqreturn_t ac_interrupt(int vec, void *dev_instance)
619 {
620 unsigned int i;
621 unsigned int FlagInt;
622 unsigned int LoopCount;
623 int handled = 0;
624
625 // printk("Applicom interrupt on IRQ %d occurred\n", vec);
626
627 LoopCount = 0;
628
629 do {
630 FlagInt = 0;
631 for (i = 0; i < MAX_BOARD; i++) {
632
633 /* Skip if this board doesn't exist */
634 if (!apbs[i].RamIO)
635 continue;
636
637 spin_lock(&apbs[i].mutex);
638
639 /* Skip if this board doesn't want attention */
640 if(readb(apbs[i].RamIO + RAM_IT_TO_PC) == 0) {
641 spin_unlock(&apbs[i].mutex);
642 continue;
643 }
644
645 handled = 1;
646 FlagInt = 1;
647 writeb(0, apbs[i].RamIO + RAM_IT_TO_PC);
648
649 if (readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2) {
650 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n",
651 i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
652 DeviceErrorCount++;
653 }
654
655 if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) &&
656 (readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) {
657
658 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n",
659 i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY));
660 DeviceErrorCount++;
661 }
662
663 if (readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2) { /* mailbox sent by the card ? */
664 if (waitqueue_active(&FlagSleepRec)) {
665 wake_up_interruptible(&FlagSleepRec);
666 }
667 }
668
669 if (readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0) { /* ram i/o free for write by pc ? */
670 if (waitqueue_active(&apbs[i].FlagSleepSend)) { /* process sleep during read ? */
671 wake_up_interruptible(&apbs[i].FlagSleepSend);
672 }
673 }
674 Dummy = readb(apbs[i].RamIO + VERS);
675
676 if(readb(apbs[i].RamIO + RAM_IT_TO_PC)) {
677 /* There's another int waiting on this card */
678 spin_unlock(&apbs[i].mutex);
679 i--;
680 } else {
681 spin_unlock(&apbs[i].mutex);
682 }
683 }
684 if (FlagInt)
685 LoopCount = 0;
686 else
687 LoopCount++;
688 } while(LoopCount < 2);
689 return IRQ_RETVAL(handled);
690 }
691
692
693
694 static long ac_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
695
696 { /* @ ADG ou ATO selon le cas */
697 int i;
698 unsigned char IndexCard;
699 void __iomem *pmem;
700 int ret = 0;
701 volatile unsigned char byte_reset_it;
702 struct st_ram_io *adgl;
703 void __user *argp = (void __user *)arg;
704
705 /* In general, the device is only openable by root anyway, so we're not
706 particularly concerned that bogus ioctls can flood the console. */
707
708 adgl = memdup_user(argp, sizeof(struct st_ram_io));
709 if (IS_ERR(adgl))
710 return PTR_ERR(adgl);
711
712 mutex_lock(&ac_mutex);
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 mutex_unlock(&ac_mutex);
723 return -EINVAL;
724 }
725
726 switch (cmd) {
727
728 case 0:
729 pmem = apbs[IndexCard].RamIO;
730 for (i = 0; i < sizeof(struct st_ram_io); i++)
731 ((unsigned char *)adgl)[i]=readb(pmem++);
732 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
733 ret = -EFAULT;
734 break;
735 case 1:
736 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
737 for (i = 0; i < 4; i++)
738 adgl->conf_end_test[i] = readb(pmem++);
739 for (i = 0; i < 2; i++)
740 adgl->error_code[i] = readb(pmem++);
741 for (i = 0; i < 4; i++)
742 adgl->parameter_error[i] = readb(pmem++);
743 pmem = apbs[IndexCard].RamIO + VERS;
744 adgl->vers = readb(pmem);
745 pmem = apbs[IndexCard].RamIO + TYPE_CARD;
746 for (i = 0; i < 20; i++)
747 adgl->reserv1[i] = readb(pmem++);
748 *(int *)&adgl->reserv1[20] =
749 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) +
750 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) +
751 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) );
752
753 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
754 ret = -EFAULT;
755 break;
756 case 2:
757 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
758 for (i = 0; i < 10; i++)
759 writeb(0xff, pmem++);
760 writeb(adgl->data_from_pc_ready,
761 apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
762
763 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
764
765 for (i = 0; i < MAX_BOARD; i++) {
766 if (apbs[i].RamIO) {
767 byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC);
768 }
769 }
770 break;
771 case 3:
772 pmem = apbs[IndexCard].RamIO + TIC_DES_FROM_PC;
773 writeb(adgl->tic_des_from_pc, pmem);
774 break;
775 case 4:
776 pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC;
777 adgl->tic_owner_to_pc = readb(pmem++);
778 adgl->numcard_owner_to_pc = readb(pmem);
779 if (copy_to_user(argp, adgl,sizeof(struct st_ram_io)))
780 ret = -EFAULT;
781 break;
782 case 5:
783 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
784 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
785 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
786 writeb(4, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
787 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
788 break;
789 case 6:
790 printk(KERN_INFO "APPLICOM driver release .... V2.8.0 ($Revision: 1.30 $)\n");
791 printk(KERN_INFO "Number of installed boards . %d\n", (int) numboards);
792 printk(KERN_INFO "Segment of board ........... %X\n", (int) mem);
793 printk(KERN_INFO "Interrupt IRQ number ....... %d\n", (int) irq);
794 for (i = 0; i < MAX_BOARD; i++) {
795 int serial;
796 char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
797
798 if (!apbs[i].RamIO)
799 continue;
800
801 for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
802 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
803 boardname[serial] = 0;
804
805 printk(KERN_INFO "Prom version board %d ....... V%d.%d %s",
806 i+1,
807 (int)(readb(apbs[i].RamIO + VERS) >> 4),
808 (int)(readb(apbs[i].RamIO + VERS) & 0xF),
809 boardname);
810
811
812 serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) +
813 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) +
814 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
815
816 if (serial != 0)
817 printk(" S/N %d\n", serial);
818 else
819 printk("\n");
820 }
821 if (DeviceErrorCount != 0)
822 printk(KERN_INFO "DeviceErrorCount ........... %d\n", DeviceErrorCount);
823 if (ReadErrorCount != 0)
824 printk(KERN_INFO "ReadErrorCount ............. %d\n", ReadErrorCount);
825 if (WriteErrorCount != 0)
826 printk(KERN_INFO "WriteErrorCount ............ %d\n", WriteErrorCount);
827 if (waitqueue_active(&FlagSleepRec))
828 printk(KERN_INFO "Process in read pending\n");
829 for (i = 0; i < MAX_BOARD; i++) {
830 if (apbs[i].RamIO && waitqueue_active(&apbs[i].FlagSleepSend))
831 printk(KERN_INFO "Process in write pending board %d\n",i+1);
832 }
833 break;
834 default:
835 ret = -ENOTTY;
836 break;
837 }
838 Dummy = readb(apbs[IndexCard].RamIO + VERS);
839 kfree(adgl);
840 mutex_unlock(&ac_mutex);
841 return 0;
842 }
843
Linux with added FPC-III support