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x86: PAT avoid aliasing in /dev/mem read/write
[linux-2.6/mini2440.git] / drivers / char / applicom.c
bloba7c4990b5b6bf0f3929bad97d5957aad0e134ce6
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(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(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 != 0 && cmd != 6 &&
716 ((IndexCard >= MAX_BOARD) || !apbs[IndexCard].RamIO)) {
717 static int warncount = 10;
718 if (warncount) {
719 printk( KERN_WARNING "APPLICOM driver IOCTL, bad board number %d\n",(int)IndexCard+1);
720 warncount--;
721 }
722 kfree(adgl);
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[IndexCard].RamIO + VERS) >> 4),
808 (int)(readb(apbs[IndexCard].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 printk(KERN_INFO "APPLICOM driver ioctl, unknown function code %d\n",cmd) ;
836 ret = -EINVAL;
837 break;
838 }
839 Dummy = readb(apbs[IndexCard].RamIO + VERS);
840 kfree(adgl);
841 return 0;
842 }
843
Support for the Chinese Samsung S3C2440 based development boards