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Linux-2.6.12-rc2
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / char / applicom.c
blob6bf2e27dc23ad9371aaeacaee12a2eb72d81cebe
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 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 #ifdef MODULE
170
171 #define applicom_init init_module
172
173 void cleanup_module(void)
174 {
175 int i;
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
193 int __init applicom_init(void)
194 {
195 int i, numisa = 0;
196 struct pci_dev *dev = NULL;
197 void __iomem *RamIO;
198 int boardno;
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)
297 printk(KERN_WARNING"ac.o: No valid ISA Applicom boards found at mem 0x%lx\n",mem);
298
299 fin:
300 init_waitqueue_head(&FlagSleepRec);
301
302 WriteErrorCount = 0;
303 ReadErrorCount = 0;
304 DeviceErrorCount = 0;
305
306 if (numboards) {
307 misc_register(&ac_miscdev);
308 for (i = 0; i < MAX_BOARD; i++) {
309 int serial;
310 char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
311
312 if (!apbs[i].RamIO)
313 continue;
314
315 for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
316 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
317
318 boardname[serial] = 0;
319
320
321 printk(KERN_INFO "Applicom board %d: %s, PROM V%d.%d",
322 i+1, boardname,
323 (int)(readb(apbs[i].RamIO + VERS) >> 4),
324 (int)(readb(apbs[i].RamIO + VERS) & 0xF));
325
326 serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) +
327 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) +
328 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
329
330 if (serial != 0)
331 printk(" S/N %d\n", serial);
332 else
333 printk("\n");
334 }
335 return 0;
336 }
337
338 else
339 return -ENXIO;
340 }
341
342
343 #ifndef MODULE
344 __initcall(applicom_init);
345 #endif
346
347 static ssize_t ac_write(struct file *file, const char __user *buf, size_t count, loff_t * ppos)
348 {
349 unsigned int NumCard; /* Board number 1 -> 8 */
350 unsigned int IndexCard; /* Index board number 0 -> 7 */
351 unsigned char TicCard; /* Board TIC to send */
352 unsigned long flags; /* Current priority */
353 struct st_ram_io st_loc;
354 struct mailbox tmpmailbox;
355 #ifdef DEBUG
356 int c;
357 #endif
358 DECLARE_WAITQUEUE(wait, current);
359
360 if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
361 static int warncount = 5;
362 if (warncount) {
363 printk(KERN_INFO "Hmmm. write() of Applicom card, length %zd != expected %zd\n",
364 count, sizeof(struct st_ram_io) + sizeof(struct mailbox));
365 warncount--;
366 }
367 return -EINVAL;
368 }
369
370 if(copy_from_user(&st_loc, buf, sizeof(struct st_ram_io)))
371 return -EFAULT;
372
373 if(copy_from_user(&tmpmailbox, &buf[sizeof(struct st_ram_io)],
374 sizeof(struct mailbox)))
375 return -EFAULT;
376
377 NumCard = st_loc.num_card; /* board number to send */
378 TicCard = st_loc.tic_des_from_pc; /* tic number to send */
379 IndexCard = NumCard - 1;
380
381 if((NumCard < 1) || (NumCard > MAX_BOARD) || !apbs[IndexCard].RamIO)
382 return -EINVAL;
383
384 #ifdef DEBUG
385 printk("Write to applicom card #%d. struct st_ram_io follows:",
386 IndexCard+1);
387
388 for (c = 0; c < sizeof(struct st_ram_io);) {
389
390 printk("\n%5.5X: %2.2X", c, ((unsigned char *) &st_loc)[c]);
391
392 for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
393 printk(" %2.2X", ((unsigned char *) &st_loc)[c]);
394 }
395 }
396
397 printk("\nstruct mailbox follows:");
398
399 for (c = 0; c < sizeof(struct mailbox);) {
400 printk("\n%5.5X: %2.2X", c, ((unsigned char *) &tmpmailbox)[c]);
401
402 for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
403 printk(" %2.2X", ((unsigned char *) &tmpmailbox)[c]);
404 }
405 }
406
407 printk("\n");
408 #endif
409
410 spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
411
412 /* Test octet ready correct */
413 if(readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) > 2) {
414 Dummy = readb(apbs[IndexCard].RamIO + VERS);
415 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
416 printk(KERN_WARNING "APPLICOM driver write error board %d, DataFromPcReady = %d\n",
417 IndexCard,(int)readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY));
418 DeviceErrorCount++;
419 return -EIO;
420 }
421
422 /* Place ourselves on the wait queue */
423 set_current_state(TASK_INTERRUPTIBLE);
424 add_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
425
426 /* Check whether the card is ready for us */
427 while (readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) != 0) {
428 Dummy = readb(apbs[IndexCard].RamIO + VERS);
429 /* It's busy. Sleep. */
430
431 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
432 schedule();
433 if (signal_pending(current)) {
434 remove_wait_queue(&apbs[IndexCard].FlagSleepSend,
435 &wait);
436 return -EINTR;
437 }
438 spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
439 set_current_state(TASK_INTERRUPTIBLE);
440 }
441
442 /* We may not have actually slept */
443 set_current_state(TASK_RUNNING);
444 remove_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
445
446 writeb(1, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
447
448 /* Which is best - lock down the pages with rawio and then
449 copy directly, or use bounce buffers? For now we do the latter
450 because it works with 2.2 still */
451 {
452 unsigned char *from = (unsigned char *) &tmpmailbox;
453 void __iomem *to = apbs[IndexCard].RamIO + RAM_FROM_PC;
454 int c;
455
456 for (c = 0; c < sizeof(struct mailbox); c++)
457 writeb(*(from++), to++);
458 }
459
460 writeb(0x20, apbs[IndexCard].RamIO + TIC_OWNER_FROM_PC);
461 writeb(0xff, apbs[IndexCard].RamIO + NUMCARD_OWNER_FROM_PC);
462 writeb(TicCard, apbs[IndexCard].RamIO + TIC_DES_FROM_PC);
463 writeb(NumCard, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
464 writeb(2, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
465 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
466 Dummy = readb(apbs[IndexCard].RamIO + VERS);
467 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
468 return 0;
469 }
470
471 static int do_ac_read(int IndexCard, char __user *buf,
472 struct st_ram_io *st_loc, struct mailbox *mailbox)
473 {
474 void __iomem *from = apbs[IndexCard].RamIO + RAM_TO_PC;
475 unsigned char *to = (unsigned char *)&mailbox;
476 #ifdef DEBUG
477 int c;
478 #endif
479
480 st_loc->tic_owner_to_pc = readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC);
481 st_loc->numcard_owner_to_pc = readb(apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
482
483
484 {
485 int c;
486
487 for (c = 0; c < sizeof(struct mailbox); c++)
488 *(to++) = readb(from++);
489 }
490 writeb(1, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
491 writeb(1, apbs[IndexCard].RamIO + TYP_ACK_FROM_PC);
492 writeb(IndexCard+1, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
493 writeb(readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC),
494 apbs[IndexCard].RamIO + TIC_ACK_FROM_PC);
495 writeb(2, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
496 writeb(0, apbs[IndexCard].RamIO + DATA_TO_PC_READY);
497 writeb(2, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
498 Dummy = readb(apbs[IndexCard].RamIO + VERS);
499
500 #ifdef DEBUG
501 printk("Read from applicom card #%d. struct st_ram_io follows:", NumCard);
502
503 for (c = 0; c < sizeof(struct st_ram_io);) {
504 printk("\n%5.5X: %2.2X", c, ((unsigned char *)st_loc)[c]);
505
506 for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
507 printk(" %2.2X", ((unsigned char *)st_loc)[c]);
508 }
509 }
510
511 printk("\nstruct mailbox follows:");
512
513 for (c = 0; c < sizeof(struct mailbox);) {
514 printk("\n%5.5X: %2.2X", c, ((unsigned char *)mailbox)[c]);
515
516 for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
517 printk(" %2.2X", ((unsigned char *)mailbox)[c]);
518 }
519 }
520 printk("\n");
521 #endif
522 return (sizeof(struct st_ram_io) + sizeof(struct mailbox));
523 }
524
525 static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_t *ptr)
526 {
527 unsigned long flags;
528 unsigned int i;
529 unsigned char tmp;
530 int ret = 0;
531 DECLARE_WAITQUEUE(wait, current);
532 #ifdef DEBUG
533 int loopcount=0;
534 #endif
535 /* No need to ratelimit this. Only root can trigger it anyway */
536 if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
537 printk( KERN_WARNING "Hmmm. read() of Applicom card, length %zd != expected %zd\n",
538 count,sizeof(struct st_ram_io) + sizeof(struct mailbox));
539 return -EINVAL;
540 }
541
542 while(1) {
543 /* Stick ourself on the wait queue */
544 set_current_state(TASK_INTERRUPTIBLE);
545 add_wait_queue(&FlagSleepRec, &wait);
546
547 /* Scan each board, looking for one which has a packet for us */
548 for (i=0; i < MAX_BOARD; i++) {
549 if (!apbs[i].RamIO)
550 continue;
551 spin_lock_irqsave(&apbs[i].mutex, flags);
552
553 tmp = readb(apbs[i].RamIO + DATA_TO_PC_READY);
554
555 if (tmp == 2) {
556 struct st_ram_io st_loc;
557 struct mailbox mailbox;
558
559 /* Got a packet for us */
560 ret = do_ac_read(i, buf, &st_loc, &mailbox);
561 spin_unlock_irqrestore(&apbs[i].mutex, flags);
562 set_current_state(TASK_RUNNING);
563 remove_wait_queue(&FlagSleepRec, &wait);
564
565 if (copy_to_user(buf, &st_loc, sizeof(st_loc)))
566 return -EFAULT;
567 if (copy_to_user(buf + sizeof(st_loc), &mailbox, sizeof(mailbox)))
568 return -EFAULT;
569 return tmp;
570 }
571
572 if (tmp > 2) {
573 /* Got an error */
574 Dummy = readb(apbs[i].RamIO + VERS);
575
576 spin_unlock_irqrestore(&apbs[i].mutex, flags);
577 set_current_state(TASK_RUNNING);
578 remove_wait_queue(&FlagSleepRec, &wait);
579
580 printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n",
581 i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
582 DeviceErrorCount++;
583 return -EIO;
584 }
585
586 /* Nothing for us. Try the next board */
587 Dummy = readb(apbs[i].RamIO + VERS);
588 spin_unlock_irqrestore(&apbs[i].mutex, flags);
589
590 } /* per board */
591
592 /* OK - No boards had data for us. Sleep now */
593
594 schedule();
595 remove_wait_queue(&FlagSleepRec, &wait);
596
597 if (signal_pending(current))
598 return -EINTR;
599
600 #ifdef DEBUG
601 if (loopcount++ > 2) {
602 printk("Looping in ac_read. loopcount %d\n", loopcount);
603 }
604 #endif
605 }
606 }
607
608 static irqreturn_t ac_interrupt(int vec, void *dev_instance, struct pt_regs *regs)
609 {
610 unsigned int i;
611 unsigned int FlagInt;
612 unsigned int LoopCount;
613 int handled = 0;
614
615 // printk("Applicom interrupt on IRQ %d occurred\n", vec);
616
617 LoopCount = 0;
618
619 do {
620 FlagInt = 0;
621 for (i = 0; i < MAX_BOARD; i++) {
622
623 /* Skip if this board doesn't exist */
624 if (!apbs[i].RamIO)
625 continue;
626
627 spin_lock(&apbs[i].mutex);
628
629 /* Skip if this board doesn't want attention */
630 if(readb(apbs[i].RamIO + RAM_IT_TO_PC) == 0) {
631 spin_unlock(&apbs[i].mutex);
632 continue;
633 }
634
635 handled = 1;
636 FlagInt = 1;
637 writeb(0, apbs[i].RamIO + RAM_IT_TO_PC);
638
639 if (readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2) {
640 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n",
641 i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
642 DeviceErrorCount++;
643 }
644
645 if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) &&
646 (readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) {
647
648 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n",
649 i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY));
650 DeviceErrorCount++;
651 }
652
653 if (readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2) { /* mailbox sent by the card ? */
654 if (waitqueue_active(&FlagSleepRec)) {
655 wake_up_interruptible(&FlagSleepRec);
656 }
657 }
658
659 if (readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0) { /* ram i/o free for write by pc ? */
660 if (waitqueue_active(&apbs[i].FlagSleepSend)) { /* process sleep during read ? */
661 wake_up_interruptible(&apbs[i].FlagSleepSend);
662 }
663 }
664 Dummy = readb(apbs[i].RamIO + VERS);
665
666 if(readb(apbs[i].RamIO + RAM_IT_TO_PC)) {
667 /* There's another int waiting on this card */
668 spin_unlock(&apbs[i].mutex);
669 i--;
670 } else {
671 spin_unlock(&apbs[i].mutex);
672 }
673 }
674 if (FlagInt)
675 LoopCount = 0;
676 else
677 LoopCount++;
678 } while(LoopCount < 2);
679 return IRQ_RETVAL(handled);
680 }
681
682
683
684 static int ac_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
685
686 { /* @ ADG ou ATO selon le cas */
687 int i;
688 unsigned char IndexCard;
689 void __iomem *pmem;
690 int ret = 0;
691 volatile unsigned char byte_reset_it;
692 struct st_ram_io *adgl;
693 void __user *argp = (void __user *)arg;
694
695 /* In general, the device is only openable by root anyway, so we're not
696 particularly concerned that bogus ioctls can flood the console. */
697
698 adgl = kmalloc(sizeof(struct st_ram_io), GFP_KERNEL);
699 if (!adgl)
700 return -ENOMEM;
701
702 if (copy_from_user(adgl, argp, sizeof(struct st_ram_io))) {
703 kfree(adgl);
704 return -EFAULT;
705 }
706
707 IndexCard = adgl->num_card-1;
708
709 if(cmd != 0 && cmd != 6 &&
710 ((IndexCard >= MAX_BOARD) || !apbs[IndexCard].RamIO)) {
711 static int warncount = 10;
712 if (warncount) {
713 printk( KERN_WARNING "APPLICOM driver IOCTL, bad board number %d\n",(int)IndexCard+1);
714 warncount--;
715 }
716 kfree(adgl);
717 return -EINVAL;
718 }
719
720 switch (cmd) {
721
722 case 0:
723 pmem = apbs[IndexCard].RamIO;
724 for (i = 0; i < sizeof(struct st_ram_io); i++)
725 ((unsigned char *)adgl)[i]=readb(pmem++);
726 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
727 ret = -EFAULT;
728 break;
729 case 1:
730 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
731 for (i = 0; i < 4; i++)
732 adgl->conf_end_test[i] = readb(pmem++);
733 for (i = 0; i < 2; i++)
734 adgl->error_code[i] = readb(pmem++);
735 for (i = 0; i < 4; i++)
736 adgl->parameter_error[i] = readb(pmem++);
737 pmem = apbs[IndexCard].RamIO + VERS;
738 adgl->vers = readb(pmem);
739 pmem = apbs[IndexCard].RamIO + TYPE_CARD;
740 for (i = 0; i < 20; i++)
741 adgl->reserv1[i] = readb(pmem++);
742 *(int *)&adgl->reserv1[20] =
743 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) +
744 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) +
745 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) );
746
747 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
748 ret = -EFAULT;
749 break;
750 case 2:
751 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
752 for (i = 0; i < 10; i++)
753 writeb(0xff, pmem++);
754 writeb(adgl->data_from_pc_ready,
755 apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
756
757 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
758
759 for (i = 0; i < MAX_BOARD; i++) {
760 if (apbs[i].RamIO) {
761 byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC);
762 }
763 }
764 break;
765 case 3:
766 pmem = apbs[IndexCard].RamIO + TIC_DES_FROM_PC;
767 writeb(adgl->tic_des_from_pc, pmem);
768 break;
769 case 4:
770 pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC;
771 adgl->tic_owner_to_pc = readb(pmem++);
772 adgl->numcard_owner_to_pc = readb(pmem);
773 if (copy_to_user(argp, adgl,sizeof(struct st_ram_io)))
774 ret = -EFAULT;
775 break;
776 case 5:
777 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
778 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
779 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
780 writeb(4, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
781 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
782 break;
783 case 6:
784 printk(KERN_INFO "APPLICOM driver release .... V2.8.0 ($Revision: 1.30 $)\n");
785 printk(KERN_INFO "Number of installed boards . %d\n", (int) numboards);
786 printk(KERN_INFO "Segment of board ........... %X\n", (int) mem);
787 printk(KERN_INFO "Interrupt IRQ number ....... %d\n", (int) irq);
788 for (i = 0; i < MAX_BOARD; i++) {
789 int serial;
790 char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
791
792 if (!apbs[i].RamIO)
793 continue;
794
795 for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
796 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
797 boardname[serial] = 0;
798
799 printk(KERN_INFO "Prom version board %d ....... V%d.%d %s",
800 i+1,
801 (int)(readb(apbs[IndexCard].RamIO + VERS) >> 4),
802 (int)(readb(apbs[IndexCard].RamIO + VERS) & 0xF),
803 boardname);
804
805
806 serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) +
807 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) +
808 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
809
810 if (serial != 0)
811 printk(" S/N %d\n", serial);
812 else
813 printk("\n");
814 }
815 if (DeviceErrorCount != 0)
816 printk(KERN_INFO "DeviceErrorCount ........... %d\n", DeviceErrorCount);
817 if (ReadErrorCount != 0)
818 printk(KERN_INFO "ReadErrorCount ............. %d\n", ReadErrorCount);
819 if (WriteErrorCount != 0)
820 printk(KERN_INFO "WriteErrorCount ............ %d\n", WriteErrorCount);
821 if (waitqueue_active(&FlagSleepRec))
822 printk(KERN_INFO "Process in read pending\n");
823 for (i = 0; i < MAX_BOARD; i++) {
824 if (apbs[i].RamIO && waitqueue_active(&apbs[i].FlagSleepSend))
825 printk(KERN_INFO "Process in write pending board %d\n",i+1);
826 }
827 break;
828 default:
829 printk(KERN_INFO "APPLICOM driver ioctl, unknown function code %d\n",cmd) ;
830 ret = -EINVAL;
831 break;
832 }
833 Dummy = readb(apbs[IndexCard].RamIO + VERS);
834 kfree(adgl);
835 return 0;
836 }
837
838 #ifndef MODULE
839 static int __init applicom_setup(char *str)
840 {
841 int ints[4];
842
843 (void) get_options(str, 4, ints);
844
845 if (ints[0] > 2) {
846 printk(KERN_WARNING "Too many arguments to 'applicom=', expected mem,irq only.\n");
847 }
848
849 if (ints[0] < 2) {
850 printk(KERN_INFO"applicom numargs: %d\n", ints[0]);
851 return 0;
852 }
853
854 mem = ints[1];
855 irq = ints[2];
856 return 1;
857 }
858
859 __setup("applicom=", applicom_setup);
860
861 #endif /* MODULE */
862
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree