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[PATCH] chardev: GPIO for SCx200 & PC-8736x: fix gpio_current, use shadow regs
[linux-2.6/kmemtrace.git] / drivers / char / applicom.c
blob9275d5e52e6de63d86309c82096f19ac5776592e
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 static void __exit applicom_exit(void)
170 {
171 unsigned int i;
172
173 misc_deregister(&ac_miscdev);
174
175 for (i = 0; i < MAX_BOARD; i++) {
176
177 if (!apbs[i].RamIO)
178 continue;
179
180 if (apbs[i].irq)
181 free_irq(apbs[i].irq, &dummy);
182
183 iounmap(apbs[i].RamIO);
184 }
185 }
186
187 static int __init applicom_init(void)
188 {
189 int i, numisa = 0;
190 struct pci_dev *dev = NULL;
191 void __iomem *RamIO;
192 int boardno, ret;
193
194 printk(KERN_INFO "Applicom driver: $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $\n");
195
196 /* No mem and irq given - check for a PCI card */
197
198 while ( (dev = pci_get_class(PCI_CLASS_OTHERS << 16, dev))) {
199
200 if (dev->vendor != PCI_VENDOR_ID_APPLICOM)
201 continue;
202
203 if (dev->device > MAX_PCI_DEVICE_NUM || dev->device == 0)
204 continue;
205
206 if (pci_enable_device(dev))
207 return -EIO;
208
209 RamIO = ioremap(dev->resource[0].start, LEN_RAM_IO);
210
211 if (!RamIO) {
212 printk(KERN_INFO "ac.o: Failed to ioremap PCI memory space at 0x%lx\n", dev->resource[0].start);
213 pci_disable_device(dev);
214 return -EIO;
215 }
216
217 printk(KERN_INFO "Applicom %s found at mem 0x%lx, irq %d\n",
218 applicom_pci_devnames[dev->device-1], dev->resource[0].start,
219 dev->irq);
220
221 boardno = ac_register_board(dev->resource[0].start, 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, SA_SHIRQ, "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(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, SA_SHIRQ, "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 ret = do_ac_read(i, buf, &st_loc, &mailbox);
570 spin_unlock_irqrestore(&apbs[i].mutex, flags);
571 set_current_state(TASK_RUNNING);
572 remove_wait_queue(&FlagSleepRec, &wait);
573
574 if (copy_to_user(buf, &st_loc, sizeof(st_loc)))
575 return -EFAULT;
576 if (copy_to_user(buf + sizeof(st_loc), &mailbox, sizeof(mailbox)))
577 return -EFAULT;
578 return tmp;
579 }
580
581 if (tmp > 2) {
582 /* Got an error */
583 Dummy = readb(apbs[i].RamIO + VERS);
584
585 spin_unlock_irqrestore(&apbs[i].mutex, flags);
586 set_current_state(TASK_RUNNING);
587 remove_wait_queue(&FlagSleepRec, &wait);
588
589 printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n",
590 i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
591 DeviceErrorCount++;
592 return -EIO;
593 }
594
595 /* Nothing for us. Try the next board */
596 Dummy = readb(apbs[i].RamIO + VERS);
597 spin_unlock_irqrestore(&apbs[i].mutex, flags);
598
599 } /* per board */
600
601 /* OK - No boards had data for us. Sleep now */
602
603 schedule();
604 remove_wait_queue(&FlagSleepRec, &wait);
605
606 if (signal_pending(current))
607 return -EINTR;
608
609 #ifdef DEBUG
610 if (loopcount++ > 2) {
611 printk(KERN_DEBUG "Looping in ac_read. loopcount %d\n", loopcount);
612 }
613 #endif
614 }
615 }
616
617 static irqreturn_t ac_interrupt(int vec, void *dev_instance, struct pt_regs *regs)
618 {
619 unsigned int i;
620 unsigned int FlagInt;
621 unsigned int LoopCount;
622 int handled = 0;
623
624 // printk("Applicom interrupt on IRQ %d occurred\n", vec);
625
626 LoopCount = 0;
627
628 do {
629 FlagInt = 0;
630 for (i = 0; i < MAX_BOARD; i++) {
631
632 /* Skip if this board doesn't exist */
633 if (!apbs[i].RamIO)
634 continue;
635
636 spin_lock(&apbs[i].mutex);
637
638 /* Skip if this board doesn't want attention */
639 if(readb(apbs[i].RamIO + RAM_IT_TO_PC) == 0) {
640 spin_unlock(&apbs[i].mutex);
641 continue;
642 }
643
644 handled = 1;
645 FlagInt = 1;
646 writeb(0, apbs[i].RamIO + RAM_IT_TO_PC);
647
648 if (readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2) {
649 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n",
650 i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
651 DeviceErrorCount++;
652 }
653
654 if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) &&
655 (readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) {
656
657 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n",
658 i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY));
659 DeviceErrorCount++;
660 }
661
662 if (readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2) { /* mailbox sent by the card ? */
663 if (waitqueue_active(&FlagSleepRec)) {
664 wake_up_interruptible(&FlagSleepRec);
665 }
666 }
667
668 if (readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0) { /* ram i/o free for write by pc ? */
669 if (waitqueue_active(&apbs[i].FlagSleepSend)) { /* process sleep during read ? */
670 wake_up_interruptible(&apbs[i].FlagSleepSend);
671 }
672 }
673 Dummy = readb(apbs[i].RamIO + VERS);
674
675 if(readb(apbs[i].RamIO + RAM_IT_TO_PC)) {
676 /* There's another int waiting on this card */
677 spin_unlock(&apbs[i].mutex);
678 i--;
679 } else {
680 spin_unlock(&apbs[i].mutex);
681 }
682 }
683 if (FlagInt)
684 LoopCount = 0;
685 else
686 LoopCount++;
687 } while(LoopCount < 2);
688 return IRQ_RETVAL(handled);
689 }
690
691
692
693 static int ac_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
694
695 { /* @ ADG ou ATO selon le cas */
696 int i;
697 unsigned char IndexCard;
698 void __iomem *pmem;
699 int ret = 0;
700 volatile unsigned char byte_reset_it;
701 struct st_ram_io *adgl;
702 void __user *argp = (void __user *)arg;
703
704 /* In general, the device is only openable by root anyway, so we're not
705 particularly concerned that bogus ioctls can flood the console. */
706
707 adgl = kmalloc(sizeof(struct st_ram_io), GFP_KERNEL);
708 if (!adgl)
709 return -ENOMEM;
710
711 if (copy_from_user(adgl, argp, sizeof(struct st_ram_io))) {
712 kfree(adgl);
713 return -EFAULT;
714 }
715
716 IndexCard = adgl->num_card-1;
717
718 if(cmd != 0 && cmd != 6 &&
719 ((IndexCard >= MAX_BOARD) || !apbs[IndexCard].RamIO)) {
720 static int warncount = 10;
721 if (warncount) {
722 printk( KERN_WARNING "APPLICOM driver IOCTL, bad board number %d\n",(int)IndexCard+1);
723 warncount--;
724 }
725 kfree(adgl);
726 return -EINVAL;
727 }
728
729 switch (cmd) {
730
731 case 0:
732 pmem = apbs[IndexCard].RamIO;
733 for (i = 0; i < sizeof(struct st_ram_io); i++)
734 ((unsigned char *)adgl)[i]=readb(pmem++);
735 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
736 ret = -EFAULT;
737 break;
738 case 1:
739 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
740 for (i = 0; i < 4; i++)
741 adgl->conf_end_test[i] = readb(pmem++);
742 for (i = 0; i < 2; i++)
743 adgl->error_code[i] = readb(pmem++);
744 for (i = 0; i < 4; i++)
745 adgl->parameter_error[i] = readb(pmem++);
746 pmem = apbs[IndexCard].RamIO + VERS;
747 adgl->vers = readb(pmem);
748 pmem = apbs[IndexCard].RamIO + TYPE_CARD;
749 for (i = 0; i < 20; i++)
750 adgl->reserv1[i] = readb(pmem++);
751 *(int *)&adgl->reserv1[20] =
752 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) +
753 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) +
754 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) );
755
756 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
757 ret = -EFAULT;
758 break;
759 case 2:
760 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
761 for (i = 0; i < 10; i++)
762 writeb(0xff, pmem++);
763 writeb(adgl->data_from_pc_ready,
764 apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
765
766 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
767
768 for (i = 0; i < MAX_BOARD; i++) {
769 if (apbs[i].RamIO) {
770 byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC);
771 }
772 }
773 break;
774 case 3:
775 pmem = apbs[IndexCard].RamIO + TIC_DES_FROM_PC;
776 writeb(adgl->tic_des_from_pc, pmem);
777 break;
778 case 4:
779 pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC;
780 adgl->tic_owner_to_pc = readb(pmem++);
781 adgl->numcard_owner_to_pc = readb(pmem);
782 if (copy_to_user(argp, adgl,sizeof(struct st_ram_io)))
783 ret = -EFAULT;
784 break;
785 case 5:
786 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
787 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
788 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
789 writeb(4, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
790 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
791 break;
792 case 6:
793 printk(KERN_INFO "APPLICOM driver release .... V2.8.0 ($Revision: 1.30 $)\n");
794 printk(KERN_INFO "Number of installed boards . %d\n", (int) numboards);
795 printk(KERN_INFO "Segment of board ........... %X\n", (int) mem);
796 printk(KERN_INFO "Interrupt IRQ number ....... %d\n", (int) irq);
797 for (i = 0; i < MAX_BOARD; i++) {
798 int serial;
799 char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
800
801 if (!apbs[i].RamIO)
802 continue;
803
804 for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
805 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
806 boardname[serial] = 0;
807
808 printk(KERN_INFO "Prom version board %d ....... V%d.%d %s",
809 i+1,
810 (int)(readb(apbs[IndexCard].RamIO + VERS) >> 4),
811 (int)(readb(apbs[IndexCard].RamIO + VERS) & 0xF),
812 boardname);
813
814
815 serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) +
816 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) +
817 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
818
819 if (serial != 0)
820 printk(" S/N %d\n", serial);
821 else
822 printk("\n");
823 }
824 if (DeviceErrorCount != 0)
825 printk(KERN_INFO "DeviceErrorCount ........... %d\n", DeviceErrorCount);
826 if (ReadErrorCount != 0)
827 printk(KERN_INFO "ReadErrorCount ............. %d\n", ReadErrorCount);
828 if (WriteErrorCount != 0)
829 printk(KERN_INFO "WriteErrorCount ............ %d\n", WriteErrorCount);
830 if (waitqueue_active(&FlagSleepRec))
831 printk(KERN_INFO "Process in read pending\n");
832 for (i = 0; i < MAX_BOARD; i++) {
833 if (apbs[i].RamIO && waitqueue_active(&apbs[i].FlagSleepSend))
834 printk(KERN_INFO "Process in write pending board %d\n",i+1);
835 }
836 break;
837 default:
838 printk(KERN_INFO "APPLICOM driver ioctl, unknown function code %d\n",cmd) ;
839 ret = -EINVAL;
840 break;
841 }
842 Dummy = readb(apbs[IndexCard].RamIO + VERS);
843 kfree(adgl);
844 return 0;
845 }
846
kmemtrace - Kernel memory tracer