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[thirdparty/linux.git] / drivers / char / applicom.c
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09c434b8 1// SPDX-License-Identifier: GPL-2.0-only
1da177e4
LT		 2/* Derived from Applicom driver ac.c for SCO Unix */
3/* Ported by David Woodhouse, Axiom (Cambridge) Ltd. */
4/* dwmw2@infradead.org 30/8/98 */
5/* $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $ */
6/* This module is for Linux 2.1 and 2.2 series kernels. */
7/*****************************************************************************/
8/* J PAGET 18/02/94 passage V2.4.2 ioctl avec code 2 reset to les interrupt */
9/* ceci pour reseter correctement apres une sortie sauvage */
10/* J PAGET 02/05/94 passage V2.4.3 dans le traitement de d'interruption, */
11/* LoopCount n'etait pas initialise a 0. */
12/* F LAFORSE 04/07/95 version V2.6.0 lecture bidon apres acces a une carte */
13/* pour liberer le bus */
14/* J.PAGET 19/11/95 version V2.6.1 Nombre, addresse,irq n'est plus configure */
15/* et passe en argument a acinit, mais est scrute sur le bus pour s'adapter */
16/* au nombre de cartes presentes sur le bus. IOCL code 6 affichait V2.4.3 */
17/* F.LAFORSE 28/11/95 creation de fichiers acXX.o avec les differentes */
3ad2f3fb 18/* addresses de base des cartes, IOCTL 6 plus complet */
1da177e4
LT		 19/* J.PAGET le 19/08/96 copie de la version V2.6 en V2.8.0 sans modification */
20/* de code autre que le texte V2.6.1 en V2.8.0 */
21/*****************************************************************************/
22
23
24#include <linux/kernel.h>
25#include <linux/module.h>
26#include <linux/interrupt.h>
174cd4b1 27#include <linux/sched/signal.h>
1da177e4
LT		 28#include <linux/slab.h>
29#include <linux/errno.h>
613655fa 30#include <linux/mutex.h>
1da177e4
LT		 31#include <linux/miscdevice.h>
32#include <linux/pci.h>
33#include <linux/wait.h>
34#include <linux/init.h>
35#include <linux/fs.h>
d7ac3c6e 36#include <linux/nospec.h>
1da177e4
LT		 37
38#include <asm/io.h>
7c0f6ba6 39#include <linux/uaccess.h>
1da177e4
LT		 40
41#include "applicom.h"
42
43
44/* NOTE: We use for loops with {write,read}b() instead of
45 memcpy_{from,to}io throughout this driver. This is because
46 the board doesn't correctly handle word accesses - only
47 bytes.
48*/
49
50
51#undef DEBUG
52
53#define MAX_BOARD 8 /* maximum of pc board possible */
54#define MAX_ISA_BOARD 4
55#define LEN_RAM_IO 0x800
56#define AC_MINOR 157
57
58#ifndef PCI_VENDOR_ID_APPLICOM
59#define PCI_VENDOR_ID_APPLICOM 0x1389
60#define PCI_DEVICE_ID_APPLICOM_PCIGENERIC 0x0001
61#define PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN 0x0002
62#define PCI_DEVICE_ID_APPLICOM_PCI2000PFB 0x0003
63#endif
1da177e4 64
613655fa 65static DEFINE_MUTEX(ac_mutex);
1da177e4
LT		 66static char *applicom_pci_devnames[] = {
67 "PCI board",
68 "PCI2000IBS / PCI2000CAN",
69 "PCI2000PFB"
70};
71
2c9c4ae6 72static const struct pci_device_id applicom_pci_tbl[] = {
53a7a1bb
JS		 73 { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCIGENERIC) },
74 { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN) },
75 { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000PFB) },
1da177e4
LT		 76 { 0 }
77};
78MODULE_DEVICE_TABLE(pci, applicom_pci_tbl);
79
80MODULE_AUTHOR("David Woodhouse & Applicom International");
81MODULE_DESCRIPTION("Driver for Applicom Profibus card");
82MODULE_LICENSE("GPL");
14f8d3ff 83MODULE_ALIAS_MISCDEV(AC_MINOR);
1da177e4
LT		 84
85MODULE_SUPPORTED_DEVICE("ac");
86
87
88static struct applicom_board {
89 unsigned long PhysIO;
90 void __iomem *RamIO;
91 wait_queue_head_t FlagSleepSend;
92 long irq;
93 spinlock_t mutex;
94} apbs[MAX_BOARD];
95
96static unsigned int irq = 0; /* interrupt number IRQ */
97static unsigned long mem = 0; /* physical segment of board */
98
1c37ab5e 99module_param_hw(irq, uint, irq, 0);
1da177e4 100MODULE_PARM_DESC(irq, "IRQ of the Applicom board");
1c37ab5e 101module_param_hw(mem, ulong, iomem, 0);
1da177e4
LT		 102MODULE_PARM_DESC(mem, "Shared Memory Address of Applicom board");
103
104static unsigned int numboards; /* number of installed boards */
105static volatile unsigned char Dummy;
106static DECLARE_WAIT_QUEUE_HEAD(FlagSleepRec);
107static unsigned int WriteErrorCount; /* number of write error */
108static unsigned int ReadErrorCount; /* number of read error */
109static unsigned int DeviceErrorCount; /* number of device error */
110
111static ssize_t ac_read (struct file *, char __user *, size_t, loff_t *);
112static ssize_t ac_write (struct file *, const char __user *, size_t, loff_t *);
55929332 113static long ac_ioctl(struct file *, unsigned int, unsigned long);
7d12e780 114static irqreturn_t ac_interrupt(int, void *);
1da177e4 115
62322d25 116static const struct file_operations ac_fops = {
1da177e4
LT		 117 .owner = THIS_MODULE,
118 .llseek = no_llseek,
119 .read = ac_read,
120 .write = ac_write,
55929332 121 .unlocked_ioctl = ac_ioctl,
1da177e4
LT		 122};
123
124static struct miscdevice ac_miscdev = {
125 AC_MINOR,
126 "ac",
127 &ac_fops
128};
129
130static int dummy; /* dev_id for request_irq() */
131
132static int ac_register_board(unsigned long physloc, void __iomem *loc,
133 unsigned char boardno)
134{
135 volatile unsigned char byte_reset_it;
136
137 if((readb(loc + CONF_END_TEST) != 0x00) ||
138 (readb(loc + CONF_END_TEST + 1) != 0x55) ||
139 (readb(loc + CONF_END_TEST + 2) != 0xAA) ||
140 (readb(loc + CONF_END_TEST + 3) != 0xFF))
141 return 0;
142
143 if (!boardno)
144 boardno = readb(loc + NUMCARD_OWNER_TO_PC);
145
e60b6e2f 146 if (!boardno || boardno > MAX_BOARD) {
1da177e4
LT		 147 printk(KERN_WARNING "Board #%d (at 0x%lx) is out of range (1 <= x <= %d).\n",
148 boardno, physloc, MAX_BOARD);
149 return 0;
150 }
151
152 if (apbs[boardno - 1].RamIO) {
153 printk(KERN_WARNING "Board #%d (at 0x%lx) conflicts with previous board #%d (at 0x%lx)\n",
154 boardno, physloc, boardno, apbs[boardno-1].PhysIO);
155 return 0;
156 }
157
158 boardno--;
159
160 apbs[boardno].PhysIO = physloc;
161 apbs[boardno].RamIO = loc;
162 init_waitqueue_head(&apbs[boardno].FlagSleepSend);
163 spin_lock_init(&apbs[boardno].mutex);
164 byte_reset_it = readb(loc + RAM_IT_TO_PC);
165
166 numboards++;
167 return boardno + 1;
168}
169
2e611390 170static void __exit applicom_exit(void)
1da177e4 171{
819a3eba 172 unsigned int i;
1da177e4
LT		 173
174 misc_deregister(&ac_miscdev);
175
176 for (i = 0; i < MAX_BOARD; i++) {
177
178 if (!apbs[i].RamIO)
179 continue;
180
181 if (apbs[i].irq)
182 free_irq(apbs[i].irq, &dummy);
183
184 iounmap(apbs[i].RamIO);
185 }
186}
187
2e611390 188static int __init applicom_init(void)
1da177e4
LT		 189{
190 int i, numisa = 0;
191 struct pci_dev *dev = NULL;
192 void __iomem *RamIO;
819a3eba 193 int boardno, ret;
1da177e4
LT		 194
195 printk(KERN_INFO "Applicom driver: $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $\n");
196
197 /* No mem and irq given - check for a PCI card */
198
199 while ( (dev = pci_get_class(PCI_CLASS_OTHERS << 16, dev))) {
200
53a7a1bb 201 if (!pci_match_id(applicom_pci_tbl, dev))
1da177e4
LT		 202 continue;
203
204 if (pci_enable_device(dev))
205 return -EIO;
206
24cb2335 207 RamIO = ioremap_nocache(pci_resource_start(dev, 0), LEN_RAM_IO);
1da177e4
LT		 208
209 if (!RamIO) {
e29419ff
GKH		 210 printk(KERN_INFO "ac.o: Failed to ioremap PCI memory "
211 "space at 0x%llx\n",
55b29a72 212 (unsigned long long)pci_resource_start(dev, 0));
1da177e4
LT		 213 pci_disable_device(dev);
214 return -EIO;
215 }
216
e29419ff
GKH		 217 printk(KERN_INFO "Applicom %s found at mem 0x%llx, irq %d\n",
218 applicom_pci_devnames[dev->device-1],
55b29a72 219 (unsigned long long)pci_resource_start(dev, 0),
1da177e4
LT		 220 dev->irq);
221
55b29a72
JS		 222 boardno = ac_register_board(pci_resource_start(dev, 0),
223 RamIO, 0);
1da177e4
LT		 224 if (!boardno) {
225 printk(KERN_INFO "ac.o: PCI Applicom device doesn't have correct signature.\n");
226 iounmap(RamIO);
227 pci_disable_device(dev);
228 continue;
229 }
230
0f2ed4c6 231 if (request_irq(dev->irq, &ac_interrupt, IRQF_SHARED, "Applicom PCI", &dummy)) {
1da177e4
LT		 232 printk(KERN_INFO "Could not allocate IRQ %d for PCI Applicom device.\n", dev->irq);
233 iounmap(RamIO);
234 pci_disable_device(dev);
235 apbs[boardno - 1].RamIO = NULL;
236 continue;
237 }
238
239 /* Enable interrupts. */
240
241 writeb(0x40, apbs[boardno - 1].RamIO + RAM_IT_FROM_PC);
242
243 apbs[boardno - 1].irq = dev->irq;
244 }
245
246 /* Finished with PCI cards. If none registered,
247 * and there was no mem/irq specified, exit */
248
249 if (!mem || !irq) {
250 if (numboards)
251 goto fin;
252 else {
253 printk(KERN_INFO "ac.o: No PCI boards found.\n");
254 printk(KERN_INFO "ac.o: For an ISA board you must supply memory and irq parameters.\n");
255 return -ENXIO;
256 }
257 }
258
259 /* Now try the specified ISA cards */
260
261 for (i = 0; i < MAX_ISA_BOARD; i++) {
24cb2335 262 RamIO = ioremap_nocache(mem + (LEN_RAM_IO * i), LEN_RAM_IO);
1da177e4
LT		 263
264 if (!RamIO) {
265 printk(KERN_INFO "ac.o: Failed to ioremap the ISA card's memory space (slot #%d)\n", i + 1);
266 continue;
267 }
268
269 if (!(boardno = ac_register_board((unsigned long)mem+ (LEN_RAM_IO*i),
270 RamIO,i+1))) {
271 iounmap(RamIO);
272 continue;
273 }
274
275 printk(KERN_NOTICE "Applicom ISA card found at mem 0x%lx, irq %d\n", mem + (LEN_RAM_IO*i), irq);
276
277 if (!numisa) {
0f2ed4c6 278 if (request_irq(irq, &ac_interrupt, IRQF_SHARED, "Applicom ISA", &dummy)) {
1da177e4
LT		 279 printk(KERN_WARNING "Could not allocate IRQ %d for ISA Applicom device.\n", irq);
280 iounmap(RamIO);
281 apbs[boardno - 1].RamIO = NULL;
282 }
283 else
284 apbs[boardno - 1].irq = irq;
285 }
286 else
287 apbs[boardno - 1].irq = 0;
288
289 numisa++;
290 }
291
292 if (!numisa)
819a3eba
CL		 293 printk(KERN_WARNING "ac.o: No valid ISA Applicom boards found "
294 "at mem 0x%lx\n", mem);
1da177e4
LT		 295
296 fin:
297 init_waitqueue_head(&FlagSleepRec);
298
299 WriteErrorCount = 0;
300 ReadErrorCount = 0;
301 DeviceErrorCount = 0;
302
303 if (numboards) {
819a3eba
CL		 304 ret = misc_register(&ac_miscdev);
305 if (ret) {
306 printk(KERN_WARNING "ac.o: Unable to register misc device\n");
307 goto out;
308 }
1da177e4
LT		 309 for (i = 0; i < MAX_BOARD; i++) {
310 int serial;
311 char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
312
313 if (!apbs[i].RamIO)
314 continue;
315
316 for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
317 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
318
319 boardname[serial] = 0;
320
321
322 printk(KERN_INFO "Applicom board %d: %s, PROM V%d.%d",
323 i+1, boardname,
324 (int)(readb(apbs[i].RamIO + VERS) >> 4),
325 (int)(readb(apbs[i].RamIO + VERS) & 0xF));
326
327 serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) +
328 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) +
329 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
330
331 if (serial != 0)
332 printk(" S/N %d\n", serial);
333 else
334 printk("\n");
335 }
336 return 0;
337 }
338
339 else
340 return -ENXIO;
819a3eba
CL		 341
342out:
343 for (i = 0; i < MAX_BOARD; i++) {
344 if (!apbs[i].RamIO)
345 continue;
346 if (apbs[i].irq)
347 free_irq(apbs[i].irq, &dummy);
348 iounmap(apbs[i].RamIO);
349 }
819a3eba 350 return ret;
1da177e4
LT		 351}
352
2e611390
AB		 353module_init(applicom_init);
354module_exit(applicom_exit);
1da177e4 355
1da177e4
LT		 356
357static ssize_t ac_write(struct file *file, const char __user *buf, size_t count, loff_t * ppos)
358{
359 unsigned int NumCard; /* Board number 1 -> 8 */
360 unsigned int IndexCard; /* Index board number 0 -> 7 */
361 unsigned char TicCard; /* Board TIC to send */
362 unsigned long flags; /* Current priority */
363 struct st_ram_io st_loc;
364 struct mailbox tmpmailbox;
365#ifdef DEBUG
366 int c;
367#endif
368 DECLARE_WAITQUEUE(wait, current);
369
370 if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
371 static int warncount = 5;
372 if (warncount) {
373 printk(KERN_INFO "Hmmm. write() of Applicom card, length %zd != expected %zd\n",
374 count, sizeof(struct st_ram_io) + sizeof(struct mailbox));
375 warncount--;
376 }
377 return -EINVAL;
378 }
379
380 if(copy_from_user(&st_loc, buf, sizeof(struct st_ram_io)))
381 return -EFAULT;
382
383 if(copy_from_user(&tmpmailbox, &buf[sizeof(struct st_ram_io)],
384 sizeof(struct mailbox)))
385 return -EFAULT;
386
387 NumCard = st_loc.num_card; /* board number to send */
388 TicCard = st_loc.tic_des_from_pc; /* tic number to send */
389 IndexCard = NumCard - 1;
390
d7ac3c6e
GS		 391 if (IndexCard >= MAX_BOARD)
392 return -EINVAL;
393 IndexCard = array_index_nospec(IndexCard, MAX_BOARD);
394
395 if (!apbs[IndexCard].RamIO)
1da177e4
LT		 396 return -EINVAL;
397
398#ifdef DEBUG
399 printk("Write to applicom card #%d. struct st_ram_io follows:",
400 IndexCard+1);
401
402 for (c = 0; c < sizeof(struct st_ram_io);) {
403
404 printk("\n%5.5X: %2.2X", c, ((unsigned char *) &st_loc)[c]);
405
406 for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
407 printk(" %2.2X", ((unsigned char *) &st_loc)[c]);
408 }
409 }
410
411 printk("\nstruct mailbox follows:");
412
413 for (c = 0; c < sizeof(struct mailbox);) {
414 printk("\n%5.5X: %2.2X", c, ((unsigned char *) &tmpmailbox)[c]);
415
416 for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
417 printk(" %2.2X", ((unsigned char *) &tmpmailbox)[c]);
418 }
419 }
420
421 printk("\n");
422#endif
423
424 spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
425
426 /* Test octet ready correct */
427 if(readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) > 2) {
428 Dummy = readb(apbs[IndexCard].RamIO + VERS);
429 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
430 printk(KERN_WARNING "APPLICOM driver write error board %d, DataFromPcReady = %d\n",
431 IndexCard,(int)readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY));
432 DeviceErrorCount++;
433 return -EIO;
434 }
435
436 /* Place ourselves on the wait queue */
437 set_current_state(TASK_INTERRUPTIBLE);
438 add_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
439
440 /* Check whether the card is ready for us */
441 while (readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) != 0) {
442 Dummy = readb(apbs[IndexCard].RamIO + VERS);
443 /* It's busy. Sleep. */
444
445 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
446 schedule();
447 if (signal_pending(current)) {
448 remove_wait_queue(&apbs[IndexCard].FlagSleepSend,
449 &wait);
450 return -EINTR;
451 }
452 spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
453 set_current_state(TASK_INTERRUPTIBLE);
454 }
455
456 /* We may not have actually slept */
457 set_current_state(TASK_RUNNING);
458 remove_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
459
460 writeb(1, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
461
462 /* Which is best - lock down the pages with rawio and then
463 copy directly, or use bounce buffers? For now we do the latter
464 because it works with 2.2 still */
465 {
466 unsigned char *from = (unsigned char *) &tmpmailbox;
467 void __iomem *to = apbs[IndexCard].RamIO + RAM_FROM_PC;
468 int c;
469
470 for (c = 0; c < sizeof(struct mailbox); c++)
471 writeb(*(from++), to++);
472 }
473
474 writeb(0x20, apbs[IndexCard].RamIO + TIC_OWNER_FROM_PC);
475 writeb(0xff, apbs[IndexCard].RamIO + NUMCARD_OWNER_FROM_PC);
476 writeb(TicCard, apbs[IndexCard].RamIO + TIC_DES_FROM_PC);
477 writeb(NumCard, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
478 writeb(2, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
479 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
480 Dummy = readb(apbs[IndexCard].RamIO + VERS);
481 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
482 return 0;
483}
484
485static int do_ac_read(int IndexCard, char __user *buf,
486 struct st_ram_io *st_loc, struct mailbox *mailbox)
487{
488 void __iomem *from = apbs[IndexCard].RamIO + RAM_TO_PC;
bc20589b 489 unsigned char *to = (unsigned char *)mailbox;
1da177e4
LT		 490#ifdef DEBUG
491 int c;
492#endif
493
494 st_loc->tic_owner_to_pc = readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC);
495 st_loc->numcard_owner_to_pc = readb(apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
496
497
498 {
499 int c;
500
501 for (c = 0; c < sizeof(struct mailbox); c++)
502 *(to++) = readb(from++);
503 }
504 writeb(1, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
505 writeb(1, apbs[IndexCard].RamIO + TYP_ACK_FROM_PC);
506 writeb(IndexCard+1, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
507 writeb(readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC),
508 apbs[IndexCard].RamIO + TIC_ACK_FROM_PC);
509 writeb(2, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
510 writeb(0, apbs[IndexCard].RamIO + DATA_TO_PC_READY);
511 writeb(2, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
512 Dummy = readb(apbs[IndexCard].RamIO + VERS);
513
514#ifdef DEBUG
515 printk("Read from applicom card #%d. struct st_ram_io follows:", NumCard);
516
517 for (c = 0; c < sizeof(struct st_ram_io);) {
518 printk("\n%5.5X: %2.2X", c, ((unsigned char *)st_loc)[c]);
519
520 for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
521 printk(" %2.2X", ((unsigned char *)st_loc)[c]);
522 }
523 }
524
525 printk("\nstruct mailbox follows:");
526
527 for (c = 0; c < sizeof(struct mailbox);) {
528 printk("\n%5.5X: %2.2X", c, ((unsigned char *)mailbox)[c]);
529
530 for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
531 printk(" %2.2X", ((unsigned char *)mailbox)[c]);
532 }
533 }
534 printk("\n");
535#endif
536 return (sizeof(struct st_ram_io) + sizeof(struct mailbox));
537}
538
539static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_t *ptr)
540{
541 unsigned long flags;
542 unsigned int i;
543 unsigned char tmp;
544 int ret = 0;
545 DECLARE_WAITQUEUE(wait, current);
546#ifdef DEBUG
547 int loopcount=0;
548#endif
549 /* No need to ratelimit this. Only root can trigger it anyway */
550 if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
551 printk( KERN_WARNING "Hmmm. read() of Applicom card, length %zd != expected %zd\n",
552 count,sizeof(struct st_ram_io) + sizeof(struct mailbox));
553 return -EINVAL;
554 }
555
556 while(1) {
557 /* Stick ourself on the wait queue */
558 set_current_state(TASK_INTERRUPTIBLE);
559 add_wait_queue(&FlagSleepRec, &wait);
560
561 /* Scan each board, looking for one which has a packet for us */
562 for (i=0; i < MAX_BOARD; i++) {
563 if (!apbs[i].RamIO)
564 continue;
565 spin_lock_irqsave(&apbs[i].mutex, flags);
566
567 tmp = readb(apbs[i].RamIO + DATA_TO_PC_READY);
568
569 if (tmp == 2) {
570 struct st_ram_io st_loc;
571 struct mailbox mailbox;
572
573 /* Got a packet for us */
19714a8a 574 memset(&st_loc, 0, sizeof(st_loc));
1da177e4
LT		 575 ret = do_ac_read(i, buf, &st_loc, &mailbox);
576 spin_unlock_irqrestore(&apbs[i].mutex, flags);
577 set_current_state(TASK_RUNNING);
578 remove_wait_queue(&FlagSleepRec, &wait);
579
580 if (copy_to_user(buf, &st_loc, sizeof(st_loc)))
581 return -EFAULT;
582 if (copy_to_user(buf + sizeof(st_loc), &mailbox, sizeof(mailbox)))
583 return -EFAULT;
584 return tmp;
585 }
586
587 if (tmp > 2) {
588 /* Got an error */
589 Dummy = readb(apbs[i].RamIO + VERS);
590
591 spin_unlock_irqrestore(&apbs[i].mutex, flags);
592 set_current_state(TASK_RUNNING);
593 remove_wait_queue(&FlagSleepRec, &wait);
594
595 printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n",
596 i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
597 DeviceErrorCount++;
598 return -EIO;
599 }
600
601 /* Nothing for us. Try the next board */
602 Dummy = readb(apbs[i].RamIO + VERS);
603 spin_unlock_irqrestore(&apbs[i].mutex, flags);
604
605 } /* per board */
606
607 /* OK - No boards had data for us. Sleep now */
608
609 schedule();
610 remove_wait_queue(&FlagSleepRec, &wait);
611
612 if (signal_pending(current))
613 return -EINTR;
614
615#ifdef DEBUG
616 if (loopcount++ > 2) {
56003191 617 printk(KERN_DEBUG "Looping in ac_read. loopcount %d\n", loopcount);
1da177e4
LT		 618 }
619#endif
620 }
621}
622
7d12e780 623static irqreturn_t ac_interrupt(int vec, void *dev_instance)
1da177e4
LT		 624{
625 unsigned int i;
626 unsigned int FlagInt;
627 unsigned int LoopCount;
628 int handled = 0;
629
630 // printk("Applicom interrupt on IRQ %d occurred\n", vec);
631
632 LoopCount = 0;
633
634 do {
635 FlagInt = 0;
636 for (i = 0; i < MAX_BOARD; i++) {
637
638 /* Skip if this board doesn't exist */
639 if (!apbs[i].RamIO)
640 continue;
641
642 spin_lock(&apbs[i].mutex);
643
644 /* Skip if this board doesn't want attention */
645 if(readb(apbs[i].RamIO + RAM_IT_TO_PC) == 0) {
646 spin_unlock(&apbs[i].mutex);
647 continue;
648 }
649
650 handled = 1;
651 FlagInt = 1;
652 writeb(0, apbs[i].RamIO + RAM_IT_TO_PC);
653
654 if (readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2) {
655 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n",
656 i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
657 DeviceErrorCount++;
658 }
659
660 if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) &&
661 (readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) {
662
663 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n",
664 i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY));
665 DeviceErrorCount++;
666 }
667
668 if (readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2) { /* mailbox sent by the card ? */
669 if (waitqueue_active(&FlagSleepRec)) {
670 wake_up_interruptible(&FlagSleepRec);
671 }
672 }
673
674 if (readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0) { /* ram i/o free for write by pc ? */
675 if (waitqueue_active(&apbs[i].FlagSleepSend)) { /* process sleep during read ? */
676 wake_up_interruptible(&apbs[i].FlagSleepSend);
677 }
678 }
679 Dummy = readb(apbs[i].RamIO + VERS);
680
681 if(readb(apbs[i].RamIO + RAM_IT_TO_PC)) {
682 /* There's another int waiting on this card */
683 spin_unlock(&apbs[i].mutex);
684 i--;
685 } else {
686 spin_unlock(&apbs[i].mutex);
687 }
688 }
689 if (FlagInt)
690 LoopCount = 0;
691 else
692 LoopCount++;
693 } while(LoopCount < 2);
694 return IRQ_RETVAL(handled);
695}
696
697
698
55929332 699static long ac_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1da177e4
LT		 700
701{ /* @ ADG ou ATO selon le cas */
702 int i;
703 unsigned char IndexCard;
704 void __iomem *pmem;
705 int ret = 0;
d7ac3c6e 706 static int warncount = 10;
1da177e4
LT		 707 volatile unsigned char byte_reset_it;
708 struct st_ram_io *adgl;
709 void __user *argp = (void __user *)arg;
710
711 /* In general, the device is only openable by root anyway, so we're not
712 particularly concerned that bogus ioctls can flood the console. */
713
f67231f8
JL		 714 adgl = memdup_user(argp, sizeof(struct st_ram_io));
715 if (IS_ERR(adgl))
716 return PTR_ERR(adgl);
55929332 717
613655fa 718 mutex_lock(&ac_mutex);
1da177e4
LT		 719 IndexCard = adgl->num_card-1;
720
d7ac3c6e
GS		 721 if (cmd != 6 && IndexCard >= MAX_BOARD)
722 goto err;
723 IndexCard = array_index_nospec(IndexCard, MAX_BOARD);
724
725 if (cmd != 6 && !apbs[IndexCard].RamIO)
726 goto err;
1da177e4
LT		 727
728 switch (cmd) {
729
730 case 0:
731 pmem = apbs[IndexCard].RamIO;
732 for (i = 0; i < sizeof(struct st_ram_io); i++)
733 ((unsigned char *)adgl)[i]=readb(pmem++);
734 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
735 ret = -EFAULT;
736 break;
737 case 1:
738 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
739 for (i = 0; i < 4; i++)
740 adgl->conf_end_test[i] = readb(pmem++);
741 for (i = 0; i < 2; i++)
742 adgl->error_code[i] = readb(pmem++);
743 for (i = 0; i < 4; i++)
744 adgl->parameter_error[i] = readb(pmem++);
745 pmem = apbs[IndexCard].RamIO + VERS;
746 adgl->vers = readb(pmem);
747 pmem = apbs[IndexCard].RamIO + TYPE_CARD;
748 for (i = 0; i < 20; i++)
749 adgl->reserv1[i] = readb(pmem++);
750 *(int *)&adgl->reserv1[20] =
751 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) +
752 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) +
753 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) );
754
755 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
756 ret = -EFAULT;
757 break;
758 case 2:
759 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
760 for (i = 0; i < 10; i++)
761 writeb(0xff, pmem++);
762 writeb(adgl->data_from_pc_ready,
763 apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
764
765 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
766
767 for (i = 0; i < MAX_BOARD; i++) {
768 if (apbs[i].RamIO) {
769 byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC);
770 }
771 }
772 break;
773 case 3:
774 pmem = apbs[IndexCard].RamIO + TIC_DES_FROM_PC;
775 writeb(adgl->tic_des_from_pc, pmem);
776 break;
777 case 4:
778 pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC;
779 adgl->tic_owner_to_pc = readb(pmem++);
780 adgl->numcard_owner_to_pc = readb(pmem);
781 if (copy_to_user(argp, adgl,sizeof(struct st_ram_io)))
782 ret = -EFAULT;
783 break;
784 case 5:
785 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
786 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
787 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
788 writeb(4, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
789 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
790 break;
791 case 6:
792 printk(KERN_INFO "APPLICOM driver release .... V2.8.0 ($Revision: 1.30 $)\n");
793 printk(KERN_INFO "Number of installed boards . %d\n", (int) numboards);
794 printk(KERN_INFO "Segment of board ........... %X\n", (int) mem);
795 printk(KERN_INFO "Interrupt IRQ number ....... %d\n", (int) irq);
796 for (i = 0; i < MAX_BOARD; i++) {
797 int serial;
798 char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
799
800 if (!apbs[i].RamIO)
801 continue;
802
803 for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
804 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
805 boardname[serial] = 0;
806
807 printk(KERN_INFO "Prom version board %d ....... V%d.%d %s",
808 i+1,
2154e0a4
DC		 809 (int)(readb(apbs[i].RamIO + VERS) >> 4),
810 (int)(readb(apbs[i].RamIO + VERS) & 0xF),
1da177e4
LT		 811 boardname);
812
813
814 serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) +
815 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) +
816 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
817
818 if (serial != 0)
819 printk(" S/N %d\n", serial);
820 else
821 printk("\n");
822 }
823 if (DeviceErrorCount != 0)
824 printk(KERN_INFO "DeviceErrorCount ........... %d\n", DeviceErrorCount);
825 if (ReadErrorCount != 0)
826 printk(KERN_INFO "ReadErrorCount ............. %d\n", ReadErrorCount);
827 if (WriteErrorCount != 0)
828 printk(KERN_INFO "WriteErrorCount ............ %d\n", WriteErrorCount);
829 if (waitqueue_active(&FlagSleepRec))
830 printk(KERN_INFO "Process in read pending\n");
831 for (i = 0; i < MAX_BOARD; i++) {
832 if (apbs[i].RamIO && waitqueue_active(&apbs[i].FlagSleepSend))
833 printk(KERN_INFO "Process in write pending board %d\n",i+1);
834 }
835 break;
836 default:
a7be18d4 837 ret = -ENOTTY;
1da177e4
LT		 838 break;
839 }
840 Dummy = readb(apbs[IndexCard].RamIO + VERS);
841 kfree(adgl);
613655fa 842 mutex_unlock(&ac_mutex);
1da177e4 843 return 0;
d7ac3c6e
GS		 844
845err:
846 if (warncount) {
847 pr_warn("APPLICOM driver IOCTL, bad board number %d\n",
848 (int)IndexCard + 1);
849 warncount--;
850 }
851 kfree(adgl);
852 mutex_unlock(&ac_mutex);
853 return -EINVAL;
854
1da177e4
LT		 855}
856
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