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[PATCH] page-writeback comment fixes
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / char / applicom.c
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1da177e4
LT		 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
62static char *applicom_pci_devnames[] = {
63 "PCI board",
64 "PCI2000IBS / PCI2000CAN",
65 "PCI2000PFB"
66};
67
68static 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};
77MODULE_DEVICE_TABLE(pci, applicom_pci_tbl);
78
79MODULE_AUTHOR("David Woodhouse & Applicom International");
80MODULE_DESCRIPTION("Driver for Applicom Profibus card");
81MODULE_LICENSE("GPL");
82
83MODULE_SUPPORTED_DEVICE("ac");
84
85
86static 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
94static unsigned int irq = 0; /* interrupt number IRQ */
95static unsigned long mem = 0; /* physical segment of board */
96
97module_param(irq, uint, 0);
98MODULE_PARM_DESC(irq, "IRQ of the Applicom board");
99module_param(mem, ulong, 0);
100MODULE_PARM_DESC(mem, "Shared Memory Address of Applicom board");
101
102static unsigned int numboards; /* number of installed boards */
103static volatile unsigned char Dummy;
104static DECLARE_WAIT_QUEUE_HEAD(FlagSleepRec);
105static unsigned int WriteErrorCount; /* number of write error */
106static unsigned int ReadErrorCount; /* number of read error */
107static unsigned int DeviceErrorCount; /* number of device error */
108
109static ssize_t ac_read (struct file *, char __user *, size_t, loff_t *);
110static ssize_t ac_write (struct file *, const char __user *, size_t, loff_t *);
111static int ac_ioctl(struct inode *, struct file *, unsigned int,
112 unsigned long);
113static irqreturn_t ac_interrupt(int, void *, struct pt_regs *);
114
115static 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
123static struct miscdevice ac_miscdev = {
124 AC_MINOR,
125 "ac",
126 &ac_fops
127};
128
129static int dummy; /* dev_id for request_irq() */
130
131static 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#ifdef MODULE
170
171#define applicom_init init_module
172
173void cleanup_module(void)
174{
819a3eba 175 unsigned int i;
1da177e4
LT		 176
177 misc_deregister(&ac_miscdev);
178
179 for (i = 0; i < MAX_BOARD; i++) {
180
181 if (!apbs[i].RamIO)
182 continue;
183
184 if (apbs[i].irq)
185 free_irq(apbs[i].irq, &dummy);
186
187 iounmap(apbs[i].RamIO);
188 }
189}
190
191#endif /* MODULE */
192
193int __init applicom_init(void)
194{
195 int i, numisa = 0;
196 struct pci_dev *dev = NULL;
197 void __iomem *RamIO;
819a3eba 198 int boardno, ret;
1da177e4
LT		 199
200 printk(KERN_INFO "Applicom driver: $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $\n");
201
202 /* No mem and irq given - check for a PCI card */
203
204 while ( (dev = pci_get_class(PCI_CLASS_OTHERS << 16, dev))) {
205
206 if (dev->vendor != PCI_VENDOR_ID_APPLICOM)
207 continue;
208
209 if (dev->device > MAX_PCI_DEVICE_NUM || dev->device == 0)
210 continue;
211
212 if (pci_enable_device(dev))
213 return -EIO;
214
215 RamIO = ioremap(dev->resource[0].start, LEN_RAM_IO);
216
217 if (!RamIO) {
218 printk(KERN_INFO "ac.o: Failed to ioremap PCI memory space at 0x%lx\n", dev->resource[0].start);
219 pci_disable_device(dev);
220 return -EIO;
221 }
222
223 printk(KERN_INFO "Applicom %s found at mem 0x%lx, irq %d\n",
224 applicom_pci_devnames[dev->device-1], dev->resource[0].start,
225 dev->irq);
226
227 boardno = ac_register_board(dev->resource[0].start, RamIO,0);
228 if (!boardno) {
229 printk(KERN_INFO "ac.o: PCI Applicom device doesn't have correct signature.\n");
230 iounmap(RamIO);
231 pci_disable_device(dev);
232 continue;
233 }
234
235 if (request_irq(dev->irq, &ac_interrupt, SA_SHIRQ, "Applicom PCI", &dummy)) {
236 printk(KERN_INFO "Could not allocate IRQ %d for PCI Applicom device.\n", dev->irq);
237 iounmap(RamIO);
238 pci_disable_device(dev);
239 apbs[boardno - 1].RamIO = NULL;
240 continue;
241 }
242
243 /* Enable interrupts. */
244
245 writeb(0x40, apbs[boardno - 1].RamIO + RAM_IT_FROM_PC);
246
247 apbs[boardno - 1].irq = dev->irq;
248 }
249
250 /* Finished with PCI cards. If none registered,
251 * and there was no mem/irq specified, exit */
252
253 if (!mem || !irq) {
254 if (numboards)
255 goto fin;
256 else {
257 printk(KERN_INFO "ac.o: No PCI boards found.\n");
258 printk(KERN_INFO "ac.o: For an ISA board you must supply memory and irq parameters.\n");
259 return -ENXIO;
260 }
261 }
262
263 /* Now try the specified ISA cards */
264
265 for (i = 0; i < MAX_ISA_BOARD; i++) {
266 RamIO = ioremap(mem + (LEN_RAM_IO * i), LEN_RAM_IO);
267
268 if (!RamIO) {
269 printk(KERN_INFO "ac.o: Failed to ioremap the ISA card's memory space (slot #%d)\n", i + 1);
270 continue;
271 }
272
273 if (!(boardno = ac_register_board((unsigned long)mem+ (LEN_RAM_IO*i),
274 RamIO,i+1))) {
275 iounmap(RamIO);
276 continue;
277 }
278
279 printk(KERN_NOTICE "Applicom ISA card found at mem 0x%lx, irq %d\n", mem + (LEN_RAM_IO*i), irq);
280
281 if (!numisa) {
282 if (request_irq(irq, &ac_interrupt, SA_SHIRQ, "Applicom ISA", &dummy)) {
283 printk(KERN_WARNING "Could not allocate IRQ %d for ISA Applicom device.\n", irq);
284 iounmap(RamIO);
285 apbs[boardno - 1].RamIO = NULL;
286 }
287 else
288 apbs[boardno - 1].irq = irq;
289 }
290 else
291 apbs[boardno - 1].irq = 0;
292
293 numisa++;
294 }
295
296 if (!numisa)
819a3eba
CL		 297 printk(KERN_WARNING "ac.o: No valid ISA Applicom boards found "
298 "at mem 0x%lx\n", mem);
1da177e4
LT		 299
300 fin:
301 init_waitqueue_head(&FlagSleepRec);
302
303 WriteErrorCount = 0;
304 ReadErrorCount = 0;
305 DeviceErrorCount = 0;
306
307 if (numboards) {
819a3eba
CL		 308 ret = misc_register(&ac_miscdev);
309 if (ret) {
310 printk(KERN_WARNING "ac.o: Unable to register misc device\n");
311 goto out;
312 }
1da177e4
LT		 313 for (i = 0; i < MAX_BOARD; i++) {
314 int serial;
315 char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
316
317 if (!apbs[i].RamIO)
318 continue;
319
320 for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
321 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
322
323 boardname[serial] = 0;
324
325
326 printk(KERN_INFO "Applicom board %d: %s, PROM V%d.%d",
327 i+1, boardname,
328 (int)(readb(apbs[i].RamIO + VERS) >> 4),
329 (int)(readb(apbs[i].RamIO + VERS) & 0xF));
330
331 serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) +
332 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) +
333 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
334
335 if (serial != 0)
336 printk(" S/N %d\n", serial);
337 else
338 printk("\n");
339 }
340 return 0;
341 }
342
343 else
344 return -ENXIO;
819a3eba
CL		 345
346out:
347 for (i = 0; i < MAX_BOARD; i++) {
348 if (!apbs[i].RamIO)
349 continue;
350 if (apbs[i].irq)
351 free_irq(apbs[i].irq, &dummy);
352 iounmap(apbs[i].RamIO);
353 }
354 pci_disable_device(dev);
355 return ret;
1da177e4
LT		 356}
357
358
359#ifndef MODULE
360__initcall(applicom_init);
361#endif
362
363static ssize_t ac_write(struct file *file, const char __user *buf, size_t count, loff_t * ppos)
364{
365 unsigned int NumCard; /* Board number 1 -> 8 */
366 unsigned int IndexCard; /* Index board number 0 -> 7 */
367 unsigned char TicCard; /* Board TIC to send */
368 unsigned long flags; /* Current priority */
369 struct st_ram_io st_loc;
370 struct mailbox tmpmailbox;
371#ifdef DEBUG
372 int c;
373#endif
374 DECLARE_WAITQUEUE(wait, current);
375
376 if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
377 static int warncount = 5;
378 if (warncount) {
379 printk(KERN_INFO "Hmmm. write() of Applicom card, length %zd != expected %zd\n",
380 count, sizeof(struct st_ram_io) + sizeof(struct mailbox));
381 warncount--;
382 }
383 return -EINVAL;
384 }
385
386 if(copy_from_user(&st_loc, buf, sizeof(struct st_ram_io)))
387 return -EFAULT;
388
389 if(copy_from_user(&tmpmailbox, &buf[sizeof(struct st_ram_io)],
390 sizeof(struct mailbox)))
391 return -EFAULT;
392
393 NumCard = st_loc.num_card; /* board number to send */
394 TicCard = st_loc.tic_des_from_pc; /* tic number to send */
395 IndexCard = NumCard - 1;
396
397 if((NumCard < 1) || (NumCard > MAX_BOARD) || !apbs[IndexCard].RamIO)
398 return -EINVAL;
399
400#ifdef DEBUG
401 printk("Write to applicom card #%d. struct st_ram_io follows:",
402 IndexCard+1);
403
404 for (c = 0; c < sizeof(struct st_ram_io);) {
405
406 printk("\n%5.5X: %2.2X", c, ((unsigned char *) &st_loc)[c]);
407
408 for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
409 printk(" %2.2X", ((unsigned char *) &st_loc)[c]);
410 }
411 }
412
413 printk("\nstruct mailbox follows:");
414
415 for (c = 0; c < sizeof(struct mailbox);) {
416 printk("\n%5.5X: %2.2X", c, ((unsigned char *) &tmpmailbox)[c]);
417
418 for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
419 printk(" %2.2X", ((unsigned char *) &tmpmailbox)[c]);
420 }
421 }
422
423 printk("\n");
424#endif
425
426 spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
427
428 /* Test octet ready correct */
429 if(readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) > 2) {
430 Dummy = readb(apbs[IndexCard].RamIO + VERS);
431 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
432 printk(KERN_WARNING "APPLICOM driver write error board %d, DataFromPcReady = %d\n",
433 IndexCard,(int)readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY));
434 DeviceErrorCount++;
435 return -EIO;
436 }
437
438 /* Place ourselves on the wait queue */
439 set_current_state(TASK_INTERRUPTIBLE);
440 add_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
441
442 /* Check whether the card is ready for us */
443 while (readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) != 0) {
444 Dummy = readb(apbs[IndexCard].RamIO + VERS);
445 /* It's busy. Sleep. */
446
447 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
448 schedule();
449 if (signal_pending(current)) {
450 remove_wait_queue(&apbs[IndexCard].FlagSleepSend,
451 &wait);
452 return -EINTR;
453 }
454 spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
455 set_current_state(TASK_INTERRUPTIBLE);
456 }
457
458 /* We may not have actually slept */
459 set_current_state(TASK_RUNNING);
460 remove_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
461
462 writeb(1, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
463
464 /* Which is best - lock down the pages with rawio and then
465 copy directly, or use bounce buffers? For now we do the latter
466 because it works with 2.2 still */
467 {
468 unsigned char *from = (unsigned char *) &tmpmailbox;
469 void __iomem *to = apbs[IndexCard].RamIO + RAM_FROM_PC;
470 int c;
471
472 for (c = 0; c < sizeof(struct mailbox); c++)
473 writeb(*(from++), to++);
474 }
475
476 writeb(0x20, apbs[IndexCard].RamIO + TIC_OWNER_FROM_PC);
477 writeb(0xff, apbs[IndexCard].RamIO + NUMCARD_OWNER_FROM_PC);
478 writeb(TicCard, apbs[IndexCard].RamIO + TIC_DES_FROM_PC);
479 writeb(NumCard, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
480 writeb(2, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
481 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
482 Dummy = readb(apbs[IndexCard].RamIO + VERS);
483 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
484 return 0;
485}
486
487static int do_ac_read(int IndexCard, char __user *buf,
488 struct st_ram_io *st_loc, struct mailbox *mailbox)
489{
490 void __iomem *from = apbs[IndexCard].RamIO + RAM_TO_PC;
491 unsigned char *to = (unsigned char *)&mailbox;
492#ifdef DEBUG
493 int c;
494#endif
495
496 st_loc->tic_owner_to_pc = readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC);
497 st_loc->numcard_owner_to_pc = readb(apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
498
499
500 {
501 int c;
502
503 for (c = 0; c < sizeof(struct mailbox); c++)
504 *(to++) = readb(from++);
505 }
506 writeb(1, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
507 writeb(1, apbs[IndexCard].RamIO + TYP_ACK_FROM_PC);
508 writeb(IndexCard+1, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
509 writeb(readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC),
510 apbs[IndexCard].RamIO + TIC_ACK_FROM_PC);
511 writeb(2, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
512 writeb(0, apbs[IndexCard].RamIO + DATA_TO_PC_READY);
513 writeb(2, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
514 Dummy = readb(apbs[IndexCard].RamIO + VERS);
515
516#ifdef DEBUG
517 printk("Read from applicom card #%d. struct st_ram_io follows:", NumCard);
518
519 for (c = 0; c < sizeof(struct st_ram_io);) {
520 printk("\n%5.5X: %2.2X", c, ((unsigned char *)st_loc)[c]);
521
522 for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
523 printk(" %2.2X", ((unsigned char *)st_loc)[c]);
524 }
525 }
526
527 printk("\nstruct mailbox follows:");
528
529 for (c = 0; c < sizeof(struct mailbox);) {
530 printk("\n%5.5X: %2.2X", c, ((unsigned char *)mailbox)[c]);
531
532 for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
533 printk(" %2.2X", ((unsigned char *)mailbox)[c]);
534 }
535 }
536 printk("\n");
537#endif
538 return (sizeof(struct st_ram_io) + sizeof(struct mailbox));
539}
540
541static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_t *ptr)
542{
543 unsigned long flags;
544 unsigned int i;
545 unsigned char tmp;
546 int ret = 0;
547 DECLARE_WAITQUEUE(wait, current);
548#ifdef DEBUG
549 int loopcount=0;
550#endif
551 /* No need to ratelimit this. Only root can trigger it anyway */
552 if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
553 printk( KERN_WARNING "Hmmm. read() of Applicom card, length %zd != expected %zd\n",
554 count,sizeof(struct st_ram_io) + sizeof(struct mailbox));
555 return -EINVAL;
556 }
557
558 while(1) {
559 /* Stick ourself on the wait queue */
560 set_current_state(TASK_INTERRUPTIBLE);
561 add_wait_queue(&FlagSleepRec, &wait);
562
563 /* Scan each board, looking for one which has a packet for us */
564 for (i=0; i < MAX_BOARD; i++) {
565 if (!apbs[i].RamIO)
566 continue;
567 spin_lock_irqsave(&apbs[i].mutex, flags);
568
569 tmp = readb(apbs[i].RamIO + DATA_TO_PC_READY);
570
571 if (tmp == 2) {
572 struct st_ram_io st_loc;
573 struct mailbox mailbox;
574
575 /* Got a packet for us */
576 ret = do_ac_read(i, buf, &st_loc, &mailbox);
577 spin_unlock_irqrestore(&apbs[i].mutex, flags);
578 set_current_state(TASK_RUNNING);
579 remove_wait_queue(&FlagSleepRec, &wait);
580
581 if (copy_to_user(buf, &st_loc, sizeof(st_loc)))
582 return -EFAULT;
583 if (copy_to_user(buf + sizeof(st_loc), &mailbox, sizeof(mailbox)))
584 return -EFAULT;
585 return tmp;
586 }
587
588 if (tmp > 2) {
589 /* Got an error */
590 Dummy = readb(apbs[i].RamIO + VERS);
591
592 spin_unlock_irqrestore(&apbs[i].mutex, flags);
593 set_current_state(TASK_RUNNING);
594 remove_wait_queue(&FlagSleepRec, &wait);
595
596 printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n",
597 i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
598 DeviceErrorCount++;
599 return -EIO;
600 }
601
602 /* Nothing for us. Try the next board */
603 Dummy = readb(apbs[i].RamIO + VERS);
604 spin_unlock_irqrestore(&apbs[i].mutex, flags);
605
606 } /* per board */
607
608 /* OK - No boards had data for us. Sleep now */
609
610 schedule();
611 remove_wait_queue(&FlagSleepRec, &wait);
612
613 if (signal_pending(current))
614 return -EINTR;
615
616#ifdef DEBUG
617 if (loopcount++ > 2) {
56003191 618 printk(KERN_DEBUG "Looping in ac_read. loopcount %d\n", loopcount);
1da177e4
LT		 619 }
620#endif
621 }
622}
623
624static irqreturn_t ac_interrupt(int vec, void *dev_instance, struct pt_regs *regs)
625{
626 unsigned int i;
627 unsigned int FlagInt;
628 unsigned int LoopCount;
629 int handled = 0;
630
631 // printk("Applicom interrupt on IRQ %d occurred\n", vec);
632
633 LoopCount = 0;
634
635 do {
636 FlagInt = 0;
637 for (i = 0; i < MAX_BOARD; i++) {
638
639 /* Skip if this board doesn't exist */
640 if (!apbs[i].RamIO)
641 continue;
642
643 spin_lock(&apbs[i].mutex);
644
645 /* Skip if this board doesn't want attention */
646 if(readb(apbs[i].RamIO + RAM_IT_TO_PC) == 0) {
647 spin_unlock(&apbs[i].mutex);
648 continue;
649 }
650
651 handled = 1;
652 FlagInt = 1;
653 writeb(0, apbs[i].RamIO + RAM_IT_TO_PC);
654
655 if (readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2) {
656 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n",
657 i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
658 DeviceErrorCount++;
659 }
660
661 if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) &&
662 (readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) {
663
664 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n",
665 i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY));
666 DeviceErrorCount++;
667 }
668
669 if (readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2) { /* mailbox sent by the card ? */
670 if (waitqueue_active(&FlagSleepRec)) {
671 wake_up_interruptible(&FlagSleepRec);
672 }
673 }
674
675 if (readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0) { /* ram i/o free for write by pc ? */
676 if (waitqueue_active(&apbs[i].FlagSleepSend)) { /* process sleep during read ? */
677 wake_up_interruptible(&apbs[i].FlagSleepSend);
678 }
679 }
680 Dummy = readb(apbs[i].RamIO + VERS);
681
682 if(readb(apbs[i].RamIO + RAM_IT_TO_PC)) {
683 /* There's another int waiting on this card */
684 spin_unlock(&apbs[i].mutex);
685 i--;
686 } else {
687 spin_unlock(&apbs[i].mutex);
688 }
689 }
690 if (FlagInt)
691 LoopCount = 0;
692 else
693 LoopCount++;
694 } while(LoopCount < 2);
695 return IRQ_RETVAL(handled);
696}
697
698
699
700static int ac_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
701
702{ /* @ ADG ou ATO selon le cas */
703 int i;
704 unsigned char IndexCard;
705 void __iomem *pmem;
706 int ret = 0;
707 volatile unsigned char byte_reset_it;
708 struct st_ram_io *adgl;
709 void __user *argp = (void __user *)arg;
710
711 /* In general, the device is only openable by root anyway, so we're not
712 particularly concerned that bogus ioctls can flood the console. */
713
714 adgl = kmalloc(sizeof(struct st_ram_io), GFP_KERNEL);
715 if (!adgl)
716 return -ENOMEM;
717
718 if (copy_from_user(adgl, argp, sizeof(struct st_ram_io))) {
719 kfree(adgl);
720 return -EFAULT;
721 }
722
723 IndexCard = adgl->num_card-1;
724
725 if(cmd != 0 && cmd != 6 &&
726 ((IndexCard >= MAX_BOARD) || !apbs[IndexCard].RamIO)) {
727 static int warncount = 10;
728 if (warncount) {
729 printk( KERN_WARNING "APPLICOM driver IOCTL, bad board number %d\n",(int)IndexCard+1);
730 warncount--;
731 }
732 kfree(adgl);
733 return -EINVAL;
734 }
735
736 switch (cmd) {
737
738 case 0:
739 pmem = apbs[IndexCard].RamIO;
740 for (i = 0; i < sizeof(struct st_ram_io); i++)
741 ((unsigned char *)adgl)[i]=readb(pmem++);
742 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
743 ret = -EFAULT;
744 break;
745 case 1:
746 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
747 for (i = 0; i < 4; i++)
748 adgl->conf_end_test[i] = readb(pmem++);
749 for (i = 0; i < 2; i++)
750 adgl->error_code[i] = readb(pmem++);
751 for (i = 0; i < 4; i++)
752 adgl->parameter_error[i] = readb(pmem++);
753 pmem = apbs[IndexCard].RamIO + VERS;
754 adgl->vers = readb(pmem);
755 pmem = apbs[IndexCard].RamIO + TYPE_CARD;
756 for (i = 0; i < 20; i++)
757 adgl->reserv1[i] = readb(pmem++);
758 *(int *)&adgl->reserv1[20] =
759 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) +
760 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) +
761 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) );
762
763 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
764 ret = -EFAULT;
765 break;
766 case 2:
767 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
768 for (i = 0; i < 10; i++)
769 writeb(0xff, pmem++);
770 writeb(adgl->data_from_pc_ready,
771 apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
772
773 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
774
775 for (i = 0; i < MAX_BOARD; i++) {
776 if (apbs[i].RamIO) {
777 byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC);
778 }
779 }
780 break;
781 case 3:
782 pmem = apbs[IndexCard].RamIO + TIC_DES_FROM_PC;
783 writeb(adgl->tic_des_from_pc, pmem);
784 break;
785 case 4:
786 pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC;
787 adgl->tic_owner_to_pc = readb(pmem++);
788 adgl->numcard_owner_to_pc = readb(pmem);
789 if (copy_to_user(argp, adgl,sizeof(struct st_ram_io)))
790 ret = -EFAULT;
791 break;
792 case 5:
793 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
794 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
795 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
796 writeb(4, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
797 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
798 break;
799 case 6:
800 printk(KERN_INFO "APPLICOM driver release .... V2.8.0 ($Revision: 1.30 $)\n");
801 printk(KERN_INFO "Number of installed boards . %d\n", (int) numboards);
802 printk(KERN_INFO "Segment of board ........... %X\n", (int) mem);
803 printk(KERN_INFO "Interrupt IRQ number ....... %d\n", (int) irq);
804 for (i = 0; i < MAX_BOARD; i++) {
805 int serial;
806 char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
807
808 if (!apbs[i].RamIO)
809 continue;
810
811 for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
812 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
813 boardname[serial] = 0;
814
815 printk(KERN_INFO "Prom version board %d ....... V%d.%d %s",
816 i+1,
817 (int)(readb(apbs[IndexCard].RamIO + VERS) >> 4),
818 (int)(readb(apbs[IndexCard].RamIO + VERS) & 0xF),
819 boardname);
820
821
822 serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) +
823 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) +
824 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
825
826 if (serial != 0)
827 printk(" S/N %d\n", serial);
828 else
829 printk("\n");
830 }
831 if (DeviceErrorCount != 0)
832 printk(KERN_INFO "DeviceErrorCount ........... %d\n", DeviceErrorCount);
833 if (ReadErrorCount != 0)
834 printk(KERN_INFO "ReadErrorCount ............. %d\n", ReadErrorCount);
835 if (WriteErrorCount != 0)
836 printk(KERN_INFO "WriteErrorCount ............ %d\n", WriteErrorCount);
837 if (waitqueue_active(&FlagSleepRec))
838 printk(KERN_INFO "Process in read pending\n");
839 for (i = 0; i < MAX_BOARD; i++) {
840 if (apbs[i].RamIO && waitqueue_active(&apbs[i].FlagSleepSend))
841 printk(KERN_INFO "Process in write pending board %d\n",i+1);
842 }
843 break;
844 default:
845 printk(KERN_INFO "APPLICOM driver ioctl, unknown function code %d\n",cmd) ;
846 ret = -EINVAL;
847 break;
848 }
849 Dummy = readb(apbs[IndexCard].RamIO + VERS);
850 kfree(adgl);
851 return 0;
852}
853
854#ifndef MODULE
855static int __init applicom_setup(char *str)
856{
857 int ints[4];
858
859 (void) get_options(str, 4, ints);
860
861 if (ints[0] > 2) {
862 printk(KERN_WARNING "Too many arguments to 'applicom=', expected mem,irq only.\n");
863 }
864
865 if (ints[0] < 2) {
866 printk(KERN_INFO"applicom numargs: %d\n", ints[0]);
867 return 0;
868 }
869
870 mem = ints[1];
871 irq = ints[2];
872 return 1;
873}
874
875__setup("applicom=", applicom_setup);
876
877#endif /* MODULE */
878
kernel source for telekom puls (alcatel/mediatek)