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[PATCH] vt: Decrement ref count of the VT backend on deallocation
[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
e60b6e2f 145 if (!boardno || boardno > MAX_BOARD) {
1da177e4
LT		 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
2e611390 169static void __exit applicom_exit(void)
1da177e4 170{
819a3eba 171 unsigned int i;
1da177e4
LT		 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
2e611390 187static int __init applicom_init(void)
1da177e4
LT		 188{
189 int i, numisa = 0;
190 struct pci_dev *dev = NULL;
191 void __iomem *RamIO;
819a3eba 192 int boardno, ret;
1da177e4
LT		 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) {
e29419ff
GKH		 212 printk(KERN_INFO "ac.o: Failed to ioremap PCI memory "
213 "space at 0x%llx\n",
214 (unsigned long long)dev->resource[0].start);
1da177e4
LT		 215 pci_disable_device(dev);
216 return -EIO;
217 }
218
e29419ff
GKH		 219 printk(KERN_INFO "Applicom %s found at mem 0x%llx, irq %d\n",
220 applicom_pci_devnames[dev->device-1],
221 (unsigned long long)dev->resource[0].start,
1da177e4
LT		 222 dev->irq);
223
224 boardno = ac_register_board(dev->resource[0].start, RamIO,0);
225 if (!boardno) {
226 printk(KERN_INFO "ac.o: PCI Applicom device doesn't have correct signature.\n");
227 iounmap(RamIO);
228 pci_disable_device(dev);
229 continue;
230 }
231
0f2ed4c6 232 if (request_irq(dev->irq, &ac_interrupt, IRQF_SHARED, "Applicom PCI", &dummy)) {
1da177e4
LT		 233 printk(KERN_INFO "Could not allocate IRQ %d for PCI Applicom device.\n", dev->irq);
234 iounmap(RamIO);
235 pci_disable_device(dev);
236 apbs[boardno - 1].RamIO = NULL;
237 continue;
238 }
239
240 /* Enable interrupts. */
241
242 writeb(0x40, apbs[boardno - 1].RamIO + RAM_IT_FROM_PC);
243
244 apbs[boardno - 1].irq = dev->irq;
245 }
246
247 /* Finished with PCI cards. If none registered,
248 * and there was no mem/irq specified, exit */
249
250 if (!mem || !irq) {
251 if (numboards)
252 goto fin;
253 else {
254 printk(KERN_INFO "ac.o: No PCI boards found.\n");
255 printk(KERN_INFO "ac.o: For an ISA board you must supply memory and irq parameters.\n");
256 return -ENXIO;
257 }
258 }
259
260 /* Now try the specified ISA cards */
261
262 for (i = 0; i < MAX_ISA_BOARD; i++) {
263 RamIO = ioremap(mem + (LEN_RAM_IO * i), LEN_RAM_IO);
264
265 if (!RamIO) {
266 printk(KERN_INFO "ac.o: Failed to ioremap the ISA card's memory space (slot #%d)\n", i + 1);
267 continue;
268 }
269
270 if (!(boardno = ac_register_board((unsigned long)mem+ (LEN_RAM_IO*i),
271 RamIO,i+1))) {
272 iounmap(RamIO);
273 continue;
274 }
275
276 printk(KERN_NOTICE "Applicom ISA card found at mem 0x%lx, irq %d\n", mem + (LEN_RAM_IO*i), irq);
277
278 if (!numisa) {
0f2ed4c6 279 if (request_irq(irq, &ac_interrupt, IRQF_SHARED, "Applicom ISA", &dummy)) {
1da177e4
LT		 280 printk(KERN_WARNING "Could not allocate IRQ %d for ISA Applicom device.\n", irq);
281 iounmap(RamIO);
282 apbs[boardno - 1].RamIO = NULL;
283 }
284 else
285 apbs[boardno - 1].irq = irq;
286 }
287 else
288 apbs[boardno - 1].irq = 0;
289
290 numisa++;
291 }
292
293 if (!numisa)
819a3eba
CL		 294 printk(KERN_WARNING "ac.o: No valid ISA Applicom boards found "
295 "at mem 0x%lx\n", mem);
1da177e4
LT		 296
297 fin:
298 init_waitqueue_head(&FlagSleepRec);
299
300 WriteErrorCount = 0;
301 ReadErrorCount = 0;
302 DeviceErrorCount = 0;
303
304 if (numboards) {
819a3eba
CL		 305 ret = misc_register(&ac_miscdev);
306 if (ret) {
307 printk(KERN_WARNING "ac.o: Unable to register misc device\n");
308 goto out;
309 }
1da177e4
LT		 310 for (i = 0; i < MAX_BOARD; i++) {
311 int serial;
312 char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
313
314 if (!apbs[i].RamIO)
315 continue;
316
317 for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
318 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
319
320 boardname[serial] = 0;
321
322
323 printk(KERN_INFO "Applicom board %d: %s, PROM V%d.%d",
324 i+1, boardname,
325 (int)(readb(apbs[i].RamIO + VERS) >> 4),
326 (int)(readb(apbs[i].RamIO + VERS) & 0xF));
327
328 serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) +
329 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) +
330 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
331
332 if (serial != 0)
333 printk(" S/N %d\n", serial);
334 else
335 printk("\n");
336 }
337 return 0;
338 }
339
340 else
341 return -ENXIO;
819a3eba
CL		 342
343out:
344 for (i = 0; i < MAX_BOARD; i++) {
345 if (!apbs[i].RamIO)
346 continue;
347 if (apbs[i].irq)
348 free_irq(apbs[i].irq, &dummy);
349 iounmap(apbs[i].RamIO);
350 }
351 pci_disable_device(dev);
352 return ret;
1da177e4
LT		 353}
354
2e611390
AB		 355module_init(applicom_init);
356module_exit(applicom_exit);
1da177e4 357
1da177e4
LT		 358
359static ssize_t ac_write(struct file *file, const char __user *buf, size_t count, loff_t * ppos)
360{
361 unsigned int NumCard; /* Board number 1 -> 8 */
362 unsigned int IndexCard; /* Index board number 0 -> 7 */
363 unsigned char TicCard; /* Board TIC to send */
364 unsigned long flags; /* Current priority */
365 struct st_ram_io st_loc;
366 struct mailbox tmpmailbox;
367#ifdef DEBUG
368 int c;
369#endif
370 DECLARE_WAITQUEUE(wait, current);
371
372 if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
373 static int warncount = 5;
374 if (warncount) {
375 printk(KERN_INFO "Hmmm. write() of Applicom card, length %zd != expected %zd\n",
376 count, sizeof(struct st_ram_io) + sizeof(struct mailbox));
377 warncount--;
378 }
379 return -EINVAL;
380 }
381
382 if(copy_from_user(&st_loc, buf, sizeof(struct st_ram_io)))
383 return -EFAULT;
384
385 if(copy_from_user(&tmpmailbox, &buf[sizeof(struct st_ram_io)],
386 sizeof(struct mailbox)))
387 return -EFAULT;
388
389 NumCard = st_loc.num_card; /* board number to send */
390 TicCard = st_loc.tic_des_from_pc; /* tic number to send */
391 IndexCard = NumCard - 1;
392
393 if((NumCard < 1) || (NumCard > MAX_BOARD) || !apbs[IndexCard].RamIO)
394 return -EINVAL;
395
396#ifdef DEBUG
397 printk("Write to applicom card #%d. struct st_ram_io follows:",
398 IndexCard+1);
399
400 for (c = 0; c < sizeof(struct st_ram_io);) {
401
402 printk("\n%5.5X: %2.2X", c, ((unsigned char *) &st_loc)[c]);
403
404 for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
405 printk(" %2.2X", ((unsigned char *) &st_loc)[c]);
406 }
407 }
408
409 printk("\nstruct mailbox follows:");
410
411 for (c = 0; c < sizeof(struct mailbox);) {
412 printk("\n%5.5X: %2.2X", c, ((unsigned char *) &tmpmailbox)[c]);
413
414 for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
415 printk(" %2.2X", ((unsigned char *) &tmpmailbox)[c]);
416 }
417 }
418
419 printk("\n");
420#endif
421
422 spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
423
424 /* Test octet ready correct */
425 if(readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) > 2) {
426 Dummy = readb(apbs[IndexCard].RamIO + VERS);
427 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
428 printk(KERN_WARNING "APPLICOM driver write error board %d, DataFromPcReady = %d\n",
429 IndexCard,(int)readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY));
430 DeviceErrorCount++;
431 return -EIO;
432 }
433
434 /* Place ourselves on the wait queue */
435 set_current_state(TASK_INTERRUPTIBLE);
436 add_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
437
438 /* Check whether the card is ready for us */
439 while (readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) != 0) {
440 Dummy = readb(apbs[IndexCard].RamIO + VERS);
441 /* It's busy. Sleep. */
442
443 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
444 schedule();
445 if (signal_pending(current)) {
446 remove_wait_queue(&apbs[IndexCard].FlagSleepSend,
447 &wait);
448 return -EINTR;
449 }
450 spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
451 set_current_state(TASK_INTERRUPTIBLE);
452 }
453
454 /* We may not have actually slept */
455 set_current_state(TASK_RUNNING);
456 remove_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
457
458 writeb(1, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
459
460 /* Which is best - lock down the pages with rawio and then
461 copy directly, or use bounce buffers? For now we do the latter
462 because it works with 2.2 still */
463 {
464 unsigned char *from = (unsigned char *) &tmpmailbox;
465 void __iomem *to = apbs[IndexCard].RamIO + RAM_FROM_PC;
466 int c;
467
468 for (c = 0; c < sizeof(struct mailbox); c++)
469 writeb(*(from++), to++);
470 }
471
472 writeb(0x20, apbs[IndexCard].RamIO + TIC_OWNER_FROM_PC);
473 writeb(0xff, apbs[IndexCard].RamIO + NUMCARD_OWNER_FROM_PC);
474 writeb(TicCard, apbs[IndexCard].RamIO + TIC_DES_FROM_PC);
475 writeb(NumCard, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
476 writeb(2, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
477 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
478 Dummy = readb(apbs[IndexCard].RamIO + VERS);
479 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
480 return 0;
481}
482
483static int do_ac_read(int IndexCard, char __user *buf,
484 struct st_ram_io *st_loc, struct mailbox *mailbox)
485{
486 void __iomem *from = apbs[IndexCard].RamIO + RAM_TO_PC;
487 unsigned char *to = (unsigned char *)&mailbox;
488#ifdef DEBUG
489 int c;
490#endif
491
492 st_loc->tic_owner_to_pc = readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC);
493 st_loc->numcard_owner_to_pc = readb(apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
494
495
496 {
497 int c;
498
499 for (c = 0; c < sizeof(struct mailbox); c++)
500 *(to++) = readb(from++);
501 }
502 writeb(1, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
503 writeb(1, apbs[IndexCard].RamIO + TYP_ACK_FROM_PC);
504 writeb(IndexCard+1, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
505 writeb(readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC),
506 apbs[IndexCard].RamIO + TIC_ACK_FROM_PC);
507 writeb(2, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
508 writeb(0, apbs[IndexCard].RamIO + DATA_TO_PC_READY);
509 writeb(2, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
510 Dummy = readb(apbs[IndexCard].RamIO + VERS);
511
512#ifdef DEBUG
513 printk("Read from applicom card #%d. struct st_ram_io follows:", NumCard);
514
515 for (c = 0; c < sizeof(struct st_ram_io);) {
516 printk("\n%5.5X: %2.2X", c, ((unsigned char *)st_loc)[c]);
517
518 for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
519 printk(" %2.2X", ((unsigned char *)st_loc)[c]);
520 }
521 }
522
523 printk("\nstruct mailbox follows:");
524
525 for (c = 0; c < sizeof(struct mailbox);) {
526 printk("\n%5.5X: %2.2X", c, ((unsigned char *)mailbox)[c]);
527
528 for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
529 printk(" %2.2X", ((unsigned char *)mailbox)[c]);
530 }
531 }
532 printk("\n");
533#endif
534 return (sizeof(struct st_ram_io) + sizeof(struct mailbox));
535}
536
537static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_t *ptr)
538{
539 unsigned long flags;
540 unsigned int i;
541 unsigned char tmp;
542 int ret = 0;
543 DECLARE_WAITQUEUE(wait, current);
544#ifdef DEBUG
545 int loopcount=0;
546#endif
547 /* No need to ratelimit this. Only root can trigger it anyway */
548 if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
549 printk( KERN_WARNING "Hmmm. read() of Applicom card, length %zd != expected %zd\n",
550 count,sizeof(struct st_ram_io) + sizeof(struct mailbox));
551 return -EINVAL;
552 }
553
554 while(1) {
555 /* Stick ourself on the wait queue */
556 set_current_state(TASK_INTERRUPTIBLE);
557 add_wait_queue(&FlagSleepRec, &wait);
558
559 /* Scan each board, looking for one which has a packet for us */
560 for (i=0; i < MAX_BOARD; i++) {
561 if (!apbs[i].RamIO)
562 continue;
563 spin_lock_irqsave(&apbs[i].mutex, flags);
564
565 tmp = readb(apbs[i].RamIO + DATA_TO_PC_READY);
566
567 if (tmp == 2) {
568 struct st_ram_io st_loc;
569 struct mailbox mailbox;
570
571 /* Got a packet for us */
572 ret = do_ac_read(i, buf, &st_loc, &mailbox);
573 spin_unlock_irqrestore(&apbs[i].mutex, flags);
574 set_current_state(TASK_RUNNING);
575 remove_wait_queue(&FlagSleepRec, &wait);
576
577 if (copy_to_user(buf, &st_loc, sizeof(st_loc)))
578 return -EFAULT;
579 if (copy_to_user(buf + sizeof(st_loc), &mailbox, sizeof(mailbox)))
580 return -EFAULT;
581 return tmp;
582 }
583
584 if (tmp > 2) {
585 /* Got an error */
586 Dummy = readb(apbs[i].RamIO + VERS);
587
588 spin_unlock_irqrestore(&apbs[i].mutex, flags);
589 set_current_state(TASK_RUNNING);
590 remove_wait_queue(&FlagSleepRec, &wait);
591
592 printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n",
593 i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
594 DeviceErrorCount++;
595 return -EIO;
596 }
597
598 /* Nothing for us. Try the next board */
599 Dummy = readb(apbs[i].RamIO + VERS);
600 spin_unlock_irqrestore(&apbs[i].mutex, flags);
601
602 } /* per board */
603
604 /* OK - No boards had data for us. Sleep now */
605
606 schedule();
607 remove_wait_queue(&FlagSleepRec, &wait);
608
609 if (signal_pending(current))
610 return -EINTR;
611
612#ifdef DEBUG
613 if (loopcount++ > 2) {
56003191 614 printk(KERN_DEBUG "Looping in ac_read. loopcount %d\n", loopcount);
1da177e4
LT		 615 }
616#endif
617 }
618}
619
620static irqreturn_t ac_interrupt(int vec, void *dev_instance, struct pt_regs *regs)
621{
622 unsigned int i;
623 unsigned int FlagInt;
624 unsigned int LoopCount;
625 int handled = 0;
626
627 // printk("Applicom interrupt on IRQ %d occurred\n", vec);
628
629 LoopCount = 0;
630
631 do {
632 FlagInt = 0;
633 for (i = 0; i < MAX_BOARD; i++) {
634
635 /* Skip if this board doesn't exist */
636 if (!apbs[i].RamIO)
637 continue;
638
639 spin_lock(&apbs[i].mutex);
640
641 /* Skip if this board doesn't want attention */
642 if(readb(apbs[i].RamIO + RAM_IT_TO_PC) == 0) {
643 spin_unlock(&apbs[i].mutex);
644 continue;
645 }
646
647 handled = 1;
648 FlagInt = 1;
649 writeb(0, apbs[i].RamIO + RAM_IT_TO_PC);
650
651 if (readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2) {
652 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n",
653 i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
654 DeviceErrorCount++;
655 }
656
657 if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) &&
658 (readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) {
659
660 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n",
661 i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY));
662 DeviceErrorCount++;
663 }
664
665 if (readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2) { /* mailbox sent by the card ? */
666 if (waitqueue_active(&FlagSleepRec)) {
667 wake_up_interruptible(&FlagSleepRec);
668 }
669 }
670
671 if (readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0) { /* ram i/o free for write by pc ? */
672 if (waitqueue_active(&apbs[i].FlagSleepSend)) { /* process sleep during read ? */
673 wake_up_interruptible(&apbs[i].FlagSleepSend);
674 }
675 }
676 Dummy = readb(apbs[i].RamIO + VERS);
677
678 if(readb(apbs[i].RamIO + RAM_IT_TO_PC)) {
679 /* There's another int waiting on this card */
680 spin_unlock(&apbs[i].mutex);
681 i--;
682 } else {
683 spin_unlock(&apbs[i].mutex);
684 }
685 }
686 if (FlagInt)
687 LoopCount = 0;
688 else
689 LoopCount++;
690 } while(LoopCount < 2);
691 return IRQ_RETVAL(handled);
692}
693
694
695
696static int ac_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
697
698{ /* @ ADG ou ATO selon le cas */
699 int i;
700 unsigned char IndexCard;
701 void __iomem *pmem;
702 int ret = 0;
703 volatile unsigned char byte_reset_it;
704 struct st_ram_io *adgl;
705 void __user *argp = (void __user *)arg;
706
707 /* In general, the device is only openable by root anyway, so we're not
708 particularly concerned that bogus ioctls can flood the console. */
709
710 adgl = kmalloc(sizeof(struct st_ram_io), GFP_KERNEL);
711 if (!adgl)
712 return -ENOMEM;
713
714 if (copy_from_user(adgl, argp, sizeof(struct st_ram_io))) {
715 kfree(adgl);
716 return -EFAULT;
717 }
718
719 IndexCard = adgl->num_card-1;
720
721 if(cmd != 0 && cmd != 6 &&
722 ((IndexCard >= MAX_BOARD) || !apbs[IndexCard].RamIO)) {
723 static int warncount = 10;
724 if (warncount) {
725 printk( KERN_WARNING "APPLICOM driver IOCTL, bad board number %d\n",(int)IndexCard+1);
726 warncount--;
727 }
728 kfree(adgl);
729 return -EINVAL;
730 }
731
732 switch (cmd) {
733
734 case 0:
735 pmem = apbs[IndexCard].RamIO;
736 for (i = 0; i < sizeof(struct st_ram_io); i++)
737 ((unsigned char *)adgl)[i]=readb(pmem++);
738 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
739 ret = -EFAULT;
740 break;
741 case 1:
742 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
743 for (i = 0; i < 4; i++)
744 adgl->conf_end_test[i] = readb(pmem++);
745 for (i = 0; i < 2; i++)
746 adgl->error_code[i] = readb(pmem++);
747 for (i = 0; i < 4; i++)
748 adgl->parameter_error[i] = readb(pmem++);
749 pmem = apbs[IndexCard].RamIO + VERS;
750 adgl->vers = readb(pmem);
751 pmem = apbs[IndexCard].RamIO + TYPE_CARD;
752 for (i = 0; i < 20; i++)
753 adgl->reserv1[i] = readb(pmem++);
754 *(int *)&adgl->reserv1[20] =
755 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) +
756 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) +
757 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) );
758
759 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
760 ret = -EFAULT;
761 break;
762 case 2:
763 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
764 for (i = 0; i < 10; i++)
765 writeb(0xff, pmem++);
766 writeb(adgl->data_from_pc_ready,
767 apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
768
769 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
770
771 for (i = 0; i < MAX_BOARD; i++) {
772 if (apbs[i].RamIO) {
773 byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC);
774 }
775 }
776 break;
777 case 3:
778 pmem = apbs[IndexCard].RamIO + TIC_DES_FROM_PC;
779 writeb(adgl->tic_des_from_pc, pmem);
780 break;
781 case 4:
782 pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC;
783 adgl->tic_owner_to_pc = readb(pmem++);
784 adgl->numcard_owner_to_pc = readb(pmem);
785 if (copy_to_user(argp, adgl,sizeof(struct st_ram_io)))
786 ret = -EFAULT;
787 break;
788 case 5:
789 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
790 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
791 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
792 writeb(4, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
793 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
794 break;
795 case 6:
796 printk(KERN_INFO "APPLICOM driver release .... V2.8.0 ($Revision: 1.30 $)\n");
797 printk(KERN_INFO "Number of installed boards . %d\n", (int) numboards);
798 printk(KERN_INFO "Segment of board ........... %X\n", (int) mem);
799 printk(KERN_INFO "Interrupt IRQ number ....... %d\n", (int) irq);
800 for (i = 0; i < MAX_BOARD; i++) {
801 int serial;
802 char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
803
804 if (!apbs[i].RamIO)
805 continue;
806
807 for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
808 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
809 boardname[serial] = 0;
810
811 printk(KERN_INFO "Prom version board %d ....... V%d.%d %s",
812 i+1,
813 (int)(readb(apbs[IndexCard].RamIO + VERS) >> 4),
814 (int)(readb(apbs[IndexCard].RamIO + VERS) & 0xF),
815 boardname);
816
817
818 serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) +
819 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) +
820 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
821
822 if (serial != 0)
823 printk(" S/N %d\n", serial);
824 else
825 printk("\n");
826 }
827 if (DeviceErrorCount != 0)
828 printk(KERN_INFO "DeviceErrorCount ........... %d\n", DeviceErrorCount);
829 if (ReadErrorCount != 0)
830 printk(KERN_INFO "ReadErrorCount ............. %d\n", ReadErrorCount);
831 if (WriteErrorCount != 0)
832 printk(KERN_INFO "WriteErrorCount ............ %d\n", WriteErrorCount);
833 if (waitqueue_active(&FlagSleepRec))
834 printk(KERN_INFO "Process in read pending\n");
835 for (i = 0; i < MAX_BOARD; i++) {
836 if (apbs[i].RamIO && waitqueue_active(&apbs[i].FlagSleepSend))
837 printk(KERN_INFO "Process in write pending board %d\n",i+1);
838 }
839 break;
840 default:
841 printk(KERN_INFO "APPLICOM driver ioctl, unknown function code %d\n",cmd) ;
842 ret = -EINVAL;
843 break;
844 }
845 Dummy = readb(apbs[IndexCard].RamIO + VERS);
846 kfree(adgl);
847 return 0;
848}
849
kernel source for telekom puls (alcatel/mediatek)