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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* 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);
David Howells7d12e782006-10-05 14:55:46 +0100113static irqreturn_t ac_interrupt(int, void *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114
Arjan van de Ven62322d22006-07-03 00:24:21 -0700115static const struct file_operations ac_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 .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
Eric Sesterhenne60b6e22006-04-10 22:54:36 -0700145 if (!boardno || boardno > MAX_BOARD) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146 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
Adrian Bunk2e611392006-06-25 05:47:34 -0700169static void __exit applicom_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170{
Christophe Lucas819a3eb2005-09-10 00:26:29 -0700171 unsigned int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172
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
Adrian Bunk2e611392006-06-25 05:47:34 -0700187static int __init applicom_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188{
189 int i, numisa = 0;
190 struct pci_dev *dev = NULL;
191 void __iomem *RamIO;
Christophe Lucas819a3eb2005-09-10 00:26:29 -0700192 int boardno, ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193
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
Jiri Slaby55b29a72008-02-08 04:21:50 -0800209 RamIO = ioremap(pci_resource_start(dev, 0), LEN_RAM_IO);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210
211 if (!RamIO) {
Greg Kroah-Hartmane29419f2006-06-12 15:20:16 -0700212 printk(KERN_INFO "ac.o: Failed to ioremap PCI memory "
213 "space at 0x%llx\n",
Jiri Slaby55b29a72008-02-08 04:21:50 -0800214 (unsigned long long)pci_resource_start(dev, 0));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215 pci_disable_device(dev);
216 return -EIO;
217 }
218
Greg Kroah-Hartmane29419f2006-06-12 15:20:16 -0700219 printk(KERN_INFO "Applicom %s found at mem 0x%llx, irq %d\n",
220 applicom_pci_devnames[dev->device-1],
Jiri Slaby55b29a72008-02-08 04:21:50 -0800221 (unsigned long long)pci_resource_start(dev, 0),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222 dev->irq);
223
Jiri Slaby55b29a72008-02-08 04:21:50 -0800224 boardno = ac_register_board(pci_resource_start(dev, 0),
225 RamIO, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 if (!boardno) {
227 printk(KERN_INFO "ac.o: PCI Applicom device doesn't have correct signature.\n");
228 iounmap(RamIO);
229 pci_disable_device(dev);
230 continue;
231 }
232
Thomas Gleixner0f2ed4c2006-07-01 19:29:33 -0700233 if (request_irq(dev->irq, &ac_interrupt, IRQF_SHARED, "Applicom PCI", &dummy)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 printk(KERN_INFO "Could not allocate IRQ %d for PCI Applicom device.\n", dev->irq);
235 iounmap(RamIO);
236 pci_disable_device(dev);
237 apbs[boardno - 1].RamIO = NULL;
238 continue;
239 }
240
241 /* Enable interrupts. */
242
243 writeb(0x40, apbs[boardno - 1].RamIO + RAM_IT_FROM_PC);
244
245 apbs[boardno - 1].irq = dev->irq;
246 }
247
248 /* Finished with PCI cards. If none registered,
249 * and there was no mem/irq specified, exit */
250
251 if (!mem || !irq) {
252 if (numboards)
253 goto fin;
254 else {
255 printk(KERN_INFO "ac.o: No PCI boards found.\n");
256 printk(KERN_INFO "ac.o: For an ISA board you must supply memory and irq parameters.\n");
257 return -ENXIO;
258 }
259 }
260
261 /* Now try the specified ISA cards */
262
263 for (i = 0; i < MAX_ISA_BOARD; i++) {
264 RamIO = ioremap(mem + (LEN_RAM_IO * i), LEN_RAM_IO);
265
266 if (!RamIO) {
267 printk(KERN_INFO "ac.o: Failed to ioremap the ISA card's memory space (slot #%d)\n", i + 1);
268 continue;
269 }
270
271 if (!(boardno = ac_register_board((unsigned long)mem+ (LEN_RAM_IO*i),
272 RamIO,i+1))) {
273 iounmap(RamIO);
274 continue;
275 }
276
277 printk(KERN_NOTICE "Applicom ISA card found at mem 0x%lx, irq %d\n", mem + (LEN_RAM_IO*i), irq);
278
279 if (!numisa) {
Thomas Gleixner0f2ed4c2006-07-01 19:29:33 -0700280 if (request_irq(irq, &ac_interrupt, IRQF_SHARED, "Applicom ISA", &dummy)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281 printk(KERN_WARNING "Could not allocate IRQ %d for ISA Applicom device.\n", irq);
282 iounmap(RamIO);
283 apbs[boardno - 1].RamIO = NULL;
284 }
285 else
286 apbs[boardno - 1].irq = irq;
287 }
288 else
289 apbs[boardno - 1].irq = 0;
290
291 numisa++;
292 }
293
294 if (!numisa)
Christophe Lucas819a3eb2005-09-10 00:26:29 -0700295 printk(KERN_WARNING "ac.o: No valid ISA Applicom boards found "
296 "at mem 0x%lx\n", mem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297
298 fin:
299 init_waitqueue_head(&FlagSleepRec);
300
301 WriteErrorCount = 0;
302 ReadErrorCount = 0;
303 DeviceErrorCount = 0;
304
305 if (numboards) {
Christophe Lucas819a3eb2005-09-10 00:26:29 -0700306 ret = misc_register(&ac_miscdev);
307 if (ret) {
308 printk(KERN_WARNING "ac.o: Unable to register misc device\n");
309 goto out;
310 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 for (i = 0; i < MAX_BOARD; i++) {
312 int serial;
313 char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
314
315 if (!apbs[i].RamIO)
316 continue;
317
318 for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
319 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
320
321 boardname[serial] = 0;
322
323
324 printk(KERN_INFO "Applicom board %d: %s, PROM V%d.%d",
325 i+1, boardname,
326 (int)(readb(apbs[i].RamIO + VERS) >> 4),
327 (int)(readb(apbs[i].RamIO + VERS) & 0xF));
328
329 serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) +
330 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) +
331 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
332
333 if (serial != 0)
334 printk(" S/N %d\n", serial);
335 else
336 printk("\n");
337 }
338 return 0;
339 }
340
341 else
342 return -ENXIO;
Christophe Lucas819a3eb2005-09-10 00:26:29 -0700343
344out:
345 for (i = 0; i < MAX_BOARD; i++) {
346 if (!apbs[i].RamIO)
347 continue;
348 if (apbs[i].irq)
349 free_irq(apbs[i].irq, &dummy);
350 iounmap(apbs[i].RamIO);
351 }
352 pci_disable_device(dev);
353 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354}
355
Adrian Bunk2e611392006-06-25 05:47:34 -0700356module_init(applicom_init);
357module_exit(applicom_exit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359
360static ssize_t ac_write(struct file *file, const char __user *buf, size_t count, loff_t * ppos)
361{
362 unsigned int NumCard; /* Board number 1 -> 8 */
363 unsigned int IndexCard; /* Index board number 0 -> 7 */
364 unsigned char TicCard; /* Board TIC to send */
365 unsigned long flags; /* Current priority */
366 struct st_ram_io st_loc;
367 struct mailbox tmpmailbox;
368#ifdef DEBUG
369 int c;
370#endif
371 DECLARE_WAITQUEUE(wait, current);
372
373 if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
374 static int warncount = 5;
375 if (warncount) {
376 printk(KERN_INFO "Hmmm. write() of Applicom card, length %zd != expected %zd\n",
377 count, sizeof(struct st_ram_io) + sizeof(struct mailbox));
378 warncount--;
379 }
380 return -EINVAL;
381 }
382
383 if(copy_from_user(&st_loc, buf, sizeof(struct st_ram_io)))
384 return -EFAULT;
385
386 if(copy_from_user(&tmpmailbox, &buf[sizeof(struct st_ram_io)],
387 sizeof(struct mailbox)))
388 return -EFAULT;
389
390 NumCard = st_loc.num_card; /* board number to send */
391 TicCard = st_loc.tic_des_from_pc; /* tic number to send */
392 IndexCard = NumCard - 1;
393
394 if((NumCard < 1) || (NumCard > MAX_BOARD) || !apbs[IndexCard].RamIO)
395 return -EINVAL;
396
397#ifdef DEBUG
398 printk("Write to applicom card #%d. struct st_ram_io follows:",
399 IndexCard+1);
400
401 for (c = 0; c < sizeof(struct st_ram_io);) {
402
403 printk("\n%5.5X: %2.2X", c, ((unsigned char *) &st_loc)[c]);
404
405 for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
406 printk(" %2.2X", ((unsigned char *) &st_loc)[c]);
407 }
408 }
409
410 printk("\nstruct mailbox follows:");
411
412 for (c = 0; c < sizeof(struct mailbox);) {
413 printk("\n%5.5X: %2.2X", c, ((unsigned char *) &tmpmailbox)[c]);
414
415 for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
416 printk(" %2.2X", ((unsigned char *) &tmpmailbox)[c]);
417 }
418 }
419
420 printk("\n");
421#endif
422
423 spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
424
425 /* Test octet ready correct */
426 if(readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) > 2) {
427 Dummy = readb(apbs[IndexCard].RamIO + VERS);
428 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
429 printk(KERN_WARNING "APPLICOM driver write error board %d, DataFromPcReady = %d\n",
430 IndexCard,(int)readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY));
431 DeviceErrorCount++;
432 return -EIO;
433 }
434
435 /* Place ourselves on the wait queue */
436 set_current_state(TASK_INTERRUPTIBLE);
437 add_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
438
439 /* Check whether the card is ready for us */
440 while (readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) != 0) {
441 Dummy = readb(apbs[IndexCard].RamIO + VERS);
442 /* It's busy. Sleep. */
443
444 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
445 schedule();
446 if (signal_pending(current)) {
447 remove_wait_queue(&apbs[IndexCard].FlagSleepSend,
448 &wait);
449 return -EINTR;
450 }
451 spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
452 set_current_state(TASK_INTERRUPTIBLE);
453 }
454
455 /* We may not have actually slept */
456 set_current_state(TASK_RUNNING);
457 remove_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
458
459 writeb(1, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
460
461 /* Which is best - lock down the pages with rawio and then
462 copy directly, or use bounce buffers? For now we do the latter
463 because it works with 2.2 still */
464 {
465 unsigned char *from = (unsigned char *) &tmpmailbox;
466 void __iomem *to = apbs[IndexCard].RamIO + RAM_FROM_PC;
467 int c;
468
469 for (c = 0; c < sizeof(struct mailbox); c++)
470 writeb(*(from++), to++);
471 }
472
473 writeb(0x20, apbs[IndexCard].RamIO + TIC_OWNER_FROM_PC);
474 writeb(0xff, apbs[IndexCard].RamIO + NUMCARD_OWNER_FROM_PC);
475 writeb(TicCard, apbs[IndexCard].RamIO + TIC_DES_FROM_PC);
476 writeb(NumCard, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
477 writeb(2, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
478 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
479 Dummy = readb(apbs[IndexCard].RamIO + VERS);
480 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
481 return 0;
482}
483
484static int do_ac_read(int IndexCard, char __user *buf,
485 struct st_ram_io *st_loc, struct mailbox *mailbox)
486{
487 void __iomem *from = apbs[IndexCard].RamIO + RAM_TO_PC;
488 unsigned char *to = (unsigned char *)&mailbox;
489#ifdef DEBUG
490 int c;
491#endif
492
493 st_loc->tic_owner_to_pc = readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC);
494 st_loc->numcard_owner_to_pc = readb(apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
495
496
497 {
498 int c;
499
500 for (c = 0; c < sizeof(struct mailbox); c++)
501 *(to++) = readb(from++);
502 }
503 writeb(1, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
504 writeb(1, apbs[IndexCard].RamIO + TYP_ACK_FROM_PC);
505 writeb(IndexCard+1, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
506 writeb(readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC),
507 apbs[IndexCard].RamIO + TIC_ACK_FROM_PC);
508 writeb(2, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
509 writeb(0, apbs[IndexCard].RamIO + DATA_TO_PC_READY);
510 writeb(2, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
511 Dummy = readb(apbs[IndexCard].RamIO + VERS);
512
513#ifdef DEBUG
514 printk("Read from applicom card #%d. struct st_ram_io follows:", NumCard);
515
516 for (c = 0; c < sizeof(struct st_ram_io);) {
517 printk("\n%5.5X: %2.2X", c, ((unsigned char *)st_loc)[c]);
518
519 for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
520 printk(" %2.2X", ((unsigned char *)st_loc)[c]);
521 }
522 }
523
524 printk("\nstruct mailbox follows:");
525
526 for (c = 0; c < sizeof(struct mailbox);) {
527 printk("\n%5.5X: %2.2X", c, ((unsigned char *)mailbox)[c]);
528
529 for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
530 printk(" %2.2X", ((unsigned char *)mailbox)[c]);
531 }
532 }
533 printk("\n");
534#endif
535 return (sizeof(struct st_ram_io) + sizeof(struct mailbox));
536}
537
538static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_t *ptr)
539{
540 unsigned long flags;
541 unsigned int i;
542 unsigned char tmp;
543 int ret = 0;
544 DECLARE_WAITQUEUE(wait, current);
545#ifdef DEBUG
546 int loopcount=0;
547#endif
548 /* No need to ratelimit this. Only root can trigger it anyway */
549 if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
550 printk( KERN_WARNING "Hmmm. read() of Applicom card, length %zd != expected %zd\n",
551 count,sizeof(struct st_ram_io) + sizeof(struct mailbox));
552 return -EINVAL;
553 }
554
555 while(1) {
556 /* Stick ourself on the wait queue */
557 set_current_state(TASK_INTERRUPTIBLE);
558 add_wait_queue(&FlagSleepRec, &wait);
559
560 /* Scan each board, looking for one which has a packet for us */
561 for (i=0; i < MAX_BOARD; i++) {
562 if (!apbs[i].RamIO)
563 continue;
564 spin_lock_irqsave(&apbs[i].mutex, flags);
565
566 tmp = readb(apbs[i].RamIO + DATA_TO_PC_READY);
567
568 if (tmp == 2) {
569 struct st_ram_io st_loc;
570 struct mailbox mailbox;
571
572 /* Got a packet for us */
573 ret = do_ac_read(i, buf, &st_loc, &mailbox);
574 spin_unlock_irqrestore(&apbs[i].mutex, flags);
575 set_current_state(TASK_RUNNING);
576 remove_wait_queue(&FlagSleepRec, &wait);
577
578 if (copy_to_user(buf, &st_loc, sizeof(st_loc)))
579 return -EFAULT;
580 if (copy_to_user(buf + sizeof(st_loc), &mailbox, sizeof(mailbox)))
581 return -EFAULT;
582 return tmp;
583 }
584
585 if (tmp > 2) {
586 /* Got an error */
587 Dummy = readb(apbs[i].RamIO + VERS);
588
589 spin_unlock_irqrestore(&apbs[i].mutex, flags);
590 set_current_state(TASK_RUNNING);
591 remove_wait_queue(&FlagSleepRec, &wait);
592
593 printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n",
594 i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
595 DeviceErrorCount++;
596 return -EIO;
597 }
598
599 /* Nothing for us. Try the next board */
600 Dummy = readb(apbs[i].RamIO + VERS);
601 spin_unlock_irqrestore(&apbs[i].mutex, flags);
602
603 } /* per board */
604
605 /* OK - No boards had data for us. Sleep now */
606
607 schedule();
608 remove_wait_queue(&FlagSleepRec, &wait);
609
610 if (signal_pending(current))
611 return -EINTR;
612
613#ifdef DEBUG
614 if (loopcount++ > 2) {
Domen Puncer56003192005-06-25 14:58:56 -0700615 printk(KERN_DEBUG "Looping in ac_read. loopcount %d\n", loopcount);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616 }
617#endif
618 }
619}
620
David Howells7d12e782006-10-05 14:55:46 +0100621static irqreturn_t ac_interrupt(int vec, void *dev_instance)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622{
623 unsigned int i;
624 unsigned int FlagInt;
625 unsigned int LoopCount;
626 int handled = 0;
627
628 // printk("Applicom interrupt on IRQ %d occurred\n", vec);
629
630 LoopCount = 0;
631
632 do {
633 FlagInt = 0;
634 for (i = 0; i < MAX_BOARD; i++) {
635
636 /* Skip if this board doesn't exist */
637 if (!apbs[i].RamIO)
638 continue;
639
640 spin_lock(&apbs[i].mutex);
641
642 /* Skip if this board doesn't want attention */
643 if(readb(apbs[i].RamIO + RAM_IT_TO_PC) == 0) {
644 spin_unlock(&apbs[i].mutex);
645 continue;
646 }
647
648 handled = 1;
649 FlagInt = 1;
650 writeb(0, apbs[i].RamIO + RAM_IT_TO_PC);
651
652 if (readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2) {
653 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n",
654 i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
655 DeviceErrorCount++;
656 }
657
658 if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) &&
659 (readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) {
660
661 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n",
662 i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY));
663 DeviceErrorCount++;
664 }
665
666 if (readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2) { /* mailbox sent by the card ? */
667 if (waitqueue_active(&FlagSleepRec)) {
668 wake_up_interruptible(&FlagSleepRec);
669 }
670 }
671
672 if (readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0) { /* ram i/o free for write by pc ? */
673 if (waitqueue_active(&apbs[i].FlagSleepSend)) { /* process sleep during read ? */
674 wake_up_interruptible(&apbs[i].FlagSleepSend);
675 }
676 }
677 Dummy = readb(apbs[i].RamIO + VERS);
678
679 if(readb(apbs[i].RamIO + RAM_IT_TO_PC)) {
680 /* There's another int waiting on this card */
681 spin_unlock(&apbs[i].mutex);
682 i--;
683 } else {
684 spin_unlock(&apbs[i].mutex);
685 }
686 }
687 if (FlagInt)
688 LoopCount = 0;
689 else
690 LoopCount++;
691 } while(LoopCount < 2);
692 return IRQ_RETVAL(handled);
693}
694
695
696
697static int ac_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
698
699{ /* @ ADG ou ATO selon le cas */
700 int i;
701 unsigned char IndexCard;
702 void __iomem *pmem;
703 int ret = 0;
704 volatile unsigned char byte_reset_it;
705 struct st_ram_io *adgl;
706 void __user *argp = (void __user *)arg;
707
708 /* In general, the device is only openable by root anyway, so we're not
709 particularly concerned that bogus ioctls can flood the console. */
710
711 adgl = kmalloc(sizeof(struct st_ram_io), GFP_KERNEL);
712 if (!adgl)
713 return -ENOMEM;
714
715 if (copy_from_user(adgl, argp, sizeof(struct st_ram_io))) {
716 kfree(adgl);
717 return -EFAULT;
718 }
719
720 IndexCard = adgl->num_card-1;
721
722 if(cmd != 0 && cmd != 6 &&
723 ((IndexCard >= MAX_BOARD) || !apbs[IndexCard].RamIO)) {
724 static int warncount = 10;
725 if (warncount) {
726 printk( KERN_WARNING "APPLICOM driver IOCTL, bad board number %d\n",(int)IndexCard+1);
727 warncount--;
728 }
729 kfree(adgl);
730 return -EINVAL;
731 }
732
733 switch (cmd) {
734
735 case 0:
736 pmem = apbs[IndexCard].RamIO;
737 for (i = 0; i < sizeof(struct st_ram_io); i++)
738 ((unsigned char *)adgl)[i]=readb(pmem++);
739 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
740 ret = -EFAULT;
741 break;
742 case 1:
743 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
744 for (i = 0; i < 4; i++)
745 adgl->conf_end_test[i] = readb(pmem++);
746 for (i = 0; i < 2; i++)
747 adgl->error_code[i] = readb(pmem++);
748 for (i = 0; i < 4; i++)
749 adgl->parameter_error[i] = readb(pmem++);
750 pmem = apbs[IndexCard].RamIO + VERS;
751 adgl->vers = readb(pmem);
752 pmem = apbs[IndexCard].RamIO + TYPE_CARD;
753 for (i = 0; i < 20; i++)
754 adgl->reserv1[i] = readb(pmem++);
755 *(int *)&adgl->reserv1[20] =
756 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) +
757 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) +
758 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) );
759
760 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
761 ret = -EFAULT;
762 break;
763 case 2:
764 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
765 for (i = 0; i < 10; i++)
766 writeb(0xff, pmem++);
767 writeb(adgl->data_from_pc_ready,
768 apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
769
770 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
771
772 for (i = 0; i < MAX_BOARD; i++) {
773 if (apbs[i].RamIO) {
774 byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC);
775 }
776 }
777 break;
778 case 3:
779 pmem = apbs[IndexCard].RamIO + TIC_DES_FROM_PC;
780 writeb(adgl->tic_des_from_pc, pmem);
781 break;
782 case 4:
783 pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC;
784 adgl->tic_owner_to_pc = readb(pmem++);
785 adgl->numcard_owner_to_pc = readb(pmem);
786 if (copy_to_user(argp, adgl,sizeof(struct st_ram_io)))
787 ret = -EFAULT;
788 break;
789 case 5:
790 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
791 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
792 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
793 writeb(4, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
794 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
795 break;
796 case 6:
797 printk(KERN_INFO "APPLICOM driver release .... V2.8.0 ($Revision: 1.30 $)\n");
798 printk(KERN_INFO "Number of installed boards . %d\n", (int) numboards);
799 printk(KERN_INFO "Segment of board ........... %X\n", (int) mem);
800 printk(KERN_INFO "Interrupt IRQ number ....... %d\n", (int) irq);
801 for (i = 0; i < MAX_BOARD; i++) {
802 int serial;
803 char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
804
805 if (!apbs[i].RamIO)
806 continue;
807
808 for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
809 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
810 boardname[serial] = 0;
811
812 printk(KERN_INFO "Prom version board %d ....... V%d.%d %s",
813 i+1,
814 (int)(readb(apbs[IndexCard].RamIO + VERS) >> 4),
815 (int)(readb(apbs[IndexCard].RamIO + VERS) & 0xF),
816 boardname);
817
818
819 serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) +
820 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) +
821 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
822
823 if (serial != 0)
824 printk(" S/N %d\n", serial);
825 else
826 printk("\n");
827 }
828 if (DeviceErrorCount != 0)
829 printk(KERN_INFO "DeviceErrorCount ........... %d\n", DeviceErrorCount);
830 if (ReadErrorCount != 0)
831 printk(KERN_INFO "ReadErrorCount ............. %d\n", ReadErrorCount);
832 if (WriteErrorCount != 0)
833 printk(KERN_INFO "WriteErrorCount ............ %d\n", WriteErrorCount);
834 if (waitqueue_active(&FlagSleepRec))
835 printk(KERN_INFO "Process in read pending\n");
836 for (i = 0; i < MAX_BOARD; i++) {
837 if (apbs[i].RamIO && waitqueue_active(&apbs[i].FlagSleepSend))
838 printk(KERN_INFO "Process in write pending board %d\n",i+1);
839 }
840 break;
841 default:
842 printk(KERN_INFO "APPLICOM driver ioctl, unknown function code %d\n",cmd) ;
843 ret = -EINVAL;
844 break;
845 }
846 Dummy = readb(apbs[IndexCard].RamIO + VERS);
847 kfree(adgl);
848 return 0;
849}
850