xref: /linux/drivers/char/applicom.c (revision 14b42963f64b98ab61fa9723c03d71aa5ef4f862)
1 /* Derived from Applicom driver ac.c for SCO Unix                            */
2 /* Ported by David Woodhouse, Axiom (Cambridge) Ltd.                         */
3 /* dwmw2@infradead.org 30/8/98                                               */
4 /* $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $			     */
5 /* This module is for Linux 2.1 and 2.2 series kernels.                      */
6 /*****************************************************************************/
7 /* J PAGET 18/02/94 passage V2.4.2 ioctl avec code 2 reset to les interrupt  */
8 /* ceci pour reseter correctement apres une sortie sauvage                   */
9 /* J PAGET 02/05/94 passage V2.4.3 dans le traitement de d'interruption,     */
10 /* LoopCount n'etait pas initialise a 0.                                     */
11 /* F LAFORSE 04/07/95 version V2.6.0 lecture bidon apres acces a une carte   */
12 /*           pour liberer le bus                                             */
13 /* J.PAGET 19/11/95 version V2.6.1 Nombre, addresse,irq n'est plus configure */
14 /* et passe en argument a acinit, mais est scrute sur le bus pour s'adapter  */
15 /* au nombre de cartes presentes sur le bus. IOCL code 6 affichait V2.4.3    */
16 /* F.LAFORSE 28/11/95 creation de fichiers acXX.o avec les differentes       */
17 /* adresses de base des cartes, IOCTL 6 plus complet                         */
18 /* J.PAGET le 19/08/96 copie de la version V2.6 en V2.8.0 sans modification  */
19 /* de code autre que le texte V2.6.1 en V2.8.0                               */
20 /*****************************************************************************/
21 
22 
23 #include <linux/kernel.h>
24 #include <linux/module.h>
25 #include <linux/interrupt.h>
26 #include <linux/slab.h>
27 #include <linux/errno.h>
28 #include <linux/miscdevice.h>
29 #include <linux/pci.h>
30 #include <linux/wait.h>
31 #include <linux/init.h>
32 #include <linux/fs.h>
33 
34 #include <asm/io.h>
35 #include <asm/uaccess.h>
36 
37 #include "applicom.h"
38 
39 
40 /* NOTE: We use for loops with {write,read}b() instead of
41    memcpy_{from,to}io throughout this driver. This is because
42    the board doesn't correctly handle word accesses - only
43    bytes.
44 */
45 
46 
47 #undef DEBUG
48 
49 #define MAX_BOARD 8		/* maximum of pc board possible */
50 #define MAX_ISA_BOARD 4
51 #define LEN_RAM_IO 0x800
52 #define AC_MINOR 157
53 
54 #ifndef PCI_VENDOR_ID_APPLICOM
55 #define PCI_VENDOR_ID_APPLICOM                0x1389
56 #define PCI_DEVICE_ID_APPLICOM_PCIGENERIC     0x0001
57 #define PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN 0x0002
58 #define PCI_DEVICE_ID_APPLICOM_PCI2000PFB     0x0003
59 #endif
60 #define MAX_PCI_DEVICE_NUM 3
61 
62 static char *applicom_pci_devnames[] = {
63 	"PCI board",
64 	"PCI2000IBS / PCI2000CAN",
65 	"PCI2000PFB"
66 };
67 
68 static struct pci_device_id applicom_pci_tbl[] = {
69 	{ PCI_VENDOR_ID_APPLICOM, PCI_DEVICE_ID_APPLICOM_PCIGENERIC,
70 	  PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
71 	{ PCI_VENDOR_ID_APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN,
72 	  PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
73 	{ PCI_VENDOR_ID_APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000PFB,
74 	  PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
75 	{ 0 }
76 };
77 MODULE_DEVICE_TABLE(pci, applicom_pci_tbl);
78 
79 MODULE_AUTHOR("David Woodhouse & Applicom International");
80 MODULE_DESCRIPTION("Driver for Applicom Profibus card");
81 MODULE_LICENSE("GPL");
82 
83 MODULE_SUPPORTED_DEVICE("ac");
84 
85 
86 static struct applicom_board {
87 	unsigned long PhysIO;
88 	void __iomem *RamIO;
89 	wait_queue_head_t FlagSleepSend;
90 	long irq;
91 	spinlock_t mutex;
92 } apbs[MAX_BOARD];
93 
94 static unsigned int irq = 0;	/* interrupt number IRQ       */
95 static unsigned long mem = 0;	/* physical segment of board  */
96 
97 module_param(irq, uint, 0);
98 MODULE_PARM_DESC(irq, "IRQ of the Applicom board");
99 module_param(mem, ulong, 0);
100 MODULE_PARM_DESC(mem, "Shared Memory Address of Applicom board");
101 
102 static unsigned int numboards;	/* number of installed boards */
103 static volatile unsigned char Dummy;
104 static DECLARE_WAIT_QUEUE_HEAD(FlagSleepRec);
105 static unsigned int WriteErrorCount;	/* number of write error      */
106 static unsigned int ReadErrorCount;	/* number of read error       */
107 static unsigned int DeviceErrorCount;	/* number of device error     */
108 
109 static ssize_t ac_read (struct file *, char __user *, size_t, loff_t *);
110 static ssize_t ac_write (struct file *, const char __user *, size_t, loff_t *);
111 static int ac_ioctl(struct inode *, struct file *, unsigned int,
112 		    unsigned long);
113 static irqreturn_t ac_interrupt(int, void *, struct pt_regs *);
114 
115 static const struct file_operations ac_fops = {
116 	.owner = THIS_MODULE,
117 	.llseek = no_llseek,
118 	.read = ac_read,
119 	.write = ac_write,
120 	.ioctl = ac_ioctl,
121 };
122 
123 static struct miscdevice ac_miscdev = {
124 	AC_MINOR,
125 	"ac",
126 	&ac_fops
127 };
128 
129 static int dummy;	/* dev_id for request_irq() */
130 
131 static int ac_register_board(unsigned long physloc, void __iomem *loc,
132 		      unsigned char boardno)
133 {
134 	volatile unsigned char byte_reset_it;
135 
136 	if((readb(loc + CONF_END_TEST)     != 0x00) ||
137 	   (readb(loc + CONF_END_TEST + 1) != 0x55) ||
138 	   (readb(loc + CONF_END_TEST + 2) != 0xAA) ||
139 	   (readb(loc + CONF_END_TEST + 3) != 0xFF))
140 		return 0;
141 
142 	if (!boardno)
143 		boardno = readb(loc + NUMCARD_OWNER_TO_PC);
144 
145 	if (!boardno || boardno > MAX_BOARD) {
146 		printk(KERN_WARNING "Board #%d (at 0x%lx) is out of range (1 <= x <= %d).\n",
147 		       boardno, physloc, MAX_BOARD);
148 		return 0;
149 	}
150 
151 	if (apbs[boardno - 1].RamIO) {
152 		printk(KERN_WARNING "Board #%d (at 0x%lx) conflicts with previous board #%d (at 0x%lx)\n",
153 		       boardno, physloc, boardno, apbs[boardno-1].PhysIO);
154 		return 0;
155 	}
156 
157 	boardno--;
158 
159 	apbs[boardno].PhysIO = physloc;
160 	apbs[boardno].RamIO = loc;
161 	init_waitqueue_head(&apbs[boardno].FlagSleepSend);
162 	spin_lock_init(&apbs[boardno].mutex);
163 	byte_reset_it = readb(loc + RAM_IT_TO_PC);
164 
165 	numboards++;
166 	return boardno + 1;
167 }
168 
169 static void __exit applicom_exit(void)
170 {
171 	unsigned int i;
172 
173 	misc_deregister(&ac_miscdev);
174 
175 	for (i = 0; i < MAX_BOARD; i++) {
176 
177 		if (!apbs[i].RamIO)
178 			continue;
179 
180 		if (apbs[i].irq)
181 			free_irq(apbs[i].irq, &dummy);
182 
183 		iounmap(apbs[i].RamIO);
184 	}
185 }
186 
187 static int __init applicom_init(void)
188 {
189 	int i, numisa = 0;
190 	struct pci_dev *dev = NULL;
191 	void __iomem *RamIO;
192 	int boardno, ret;
193 
194 	printk(KERN_INFO "Applicom driver: $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $\n");
195 
196 	/* No mem and irq given - check for a PCI card */
197 
198 	while ( (dev = pci_get_class(PCI_CLASS_OTHERS << 16, dev))) {
199 
200 		if (dev->vendor != PCI_VENDOR_ID_APPLICOM)
201 			continue;
202 
203 		if (dev->device  > MAX_PCI_DEVICE_NUM || dev->device == 0)
204 			continue;
205 
206 		if (pci_enable_device(dev))
207 			return -EIO;
208 
209 		RamIO = ioremap(dev->resource[0].start, LEN_RAM_IO);
210 
211 		if (!RamIO) {
212 			printk(KERN_INFO "ac.o: Failed to ioremap PCI memory "
213 				"space at 0x%llx\n",
214 				(unsigned long long)dev->resource[0].start);
215 			pci_disable_device(dev);
216 			return -EIO;
217 		}
218 
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,
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 
232 		if (request_irq(dev->irq, &ac_interrupt, IRQF_SHARED, "Applicom PCI", &dummy)) {
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) {
279 			if (request_irq(irq, &ac_interrupt, IRQF_SHARED, "Applicom ISA", &dummy)) {
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)
294 		printk(KERN_WARNING "ac.o: No valid ISA Applicom boards found "
295 				"at mem 0x%lx\n", mem);
296 
297  fin:
298 	init_waitqueue_head(&FlagSleepRec);
299 
300 	WriteErrorCount = 0;
301 	ReadErrorCount = 0;
302 	DeviceErrorCount = 0;
303 
304 	if (numboards) {
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 		}
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;
342 
343 out:
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;
353 }
354 
355 module_init(applicom_init);
356 module_exit(applicom_exit);
357 
358 
359 static 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 
483 static 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 
537 static 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) {
614 			printk(KERN_DEBUG "Looping in ac_read. loopcount %d\n", loopcount);
615 		}
616 #endif
617 	}
618 }
619 
620 static 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 
696 static 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 
850