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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec
[linux-2.6-block.git] / drivers / char / applicom.c
CommitLineData
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
1da177e4
LT		 56
57#ifndef PCI_VENDOR_ID_APPLICOM
58#define PCI_VENDOR_ID_APPLICOM 0x1389
59#define PCI_DEVICE_ID_APPLICOM_PCIGENERIC 0x0001
60#define PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN 0x0002
61#define PCI_DEVICE_ID_APPLICOM_PCI2000PFB 0x0003
62#endif
1da177e4 63
613655fa 64static DEFINE_MUTEX(ac_mutex);
1da177e4
LT		 65static char *applicom_pci_devnames[] = {
66 "PCI board",
67 "PCI2000IBS / PCI2000CAN",
68 "PCI2000PFB"
69};
70
2c9c4ae6 71static const struct pci_device_id applicom_pci_tbl[] = {
53a7a1bb
JS		 72 { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCIGENERIC) },
73 { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN) },
74 { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000PFB) },
1da177e4
LT		 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");
14f8d3ff 82MODULE_ALIAS_MISCDEV(AC_MINOR);
1da177e4 83
1da177e4
LT		 84static struct applicom_board {
85 unsigned long PhysIO;
86 void __iomem *RamIO;
87 wait_queue_head_t FlagSleepSend;
88 long irq;
89 spinlock_t mutex;
90} apbs[MAX_BOARD];
91
cab00a3e
JW		 92static unsigned int irq; /* interrupt number IRQ */
93static unsigned long mem; /* physical segment of board */
1da177e4 94
1c37ab5e 95module_param_hw(irq, uint, irq, 0);
1da177e4 96MODULE_PARM_DESC(irq, "IRQ of the Applicom board");
1c37ab5e 97module_param_hw(mem, ulong, iomem, 0);
1da177e4
LT		 98MODULE_PARM_DESC(mem, "Shared Memory Address of Applicom board");
99
100static unsigned int numboards; /* number of installed boards */
101static volatile unsigned char Dummy;
102static DECLARE_WAIT_QUEUE_HEAD(FlagSleepRec);
103static unsigned int WriteErrorCount; /* number of write error */
104static unsigned int ReadErrorCount; /* number of read error */
105static unsigned int DeviceErrorCount; /* number of device error */
106
107static ssize_t ac_read (struct file *, char __user *, size_t, loff_t *);
108static ssize_t ac_write (struct file *, const char __user *, size_t, loff_t *);
55929332 109static long ac_ioctl(struct file *, unsigned int, unsigned long);
7d12e780 110static irqreturn_t ac_interrupt(int, void *);
1da177e4 111
62322d25 112static const struct file_operations ac_fops = {
1da177e4
LT		 113 .owner = THIS_MODULE,
114 .llseek = no_llseek,
115 .read = ac_read,
116 .write = ac_write,
55929332 117 .unlocked_ioctl = ac_ioctl,
1da177e4
LT		 118};
119
120static struct miscdevice ac_miscdev = {
121 AC_MINOR,
122 "ac",
123 &ac_fops
124};
125
126static int dummy; /* dev_id for request_irq() */
127
128static int ac_register_board(unsigned long physloc, void __iomem *loc,
129 unsigned char boardno)
130{
131 volatile unsigned char byte_reset_it;
132
133 if((readb(loc + CONF_END_TEST) != 0x00) ||
134 (readb(loc + CONF_END_TEST + 1) != 0x55) ||
135 (readb(loc + CONF_END_TEST + 2) != 0xAA) ||
136 (readb(loc + CONF_END_TEST + 3) != 0xFF))
137 return 0;
138
139 if (!boardno)
140 boardno = readb(loc + NUMCARD_OWNER_TO_PC);
141
e60b6e2f 142 if (!boardno || boardno > MAX_BOARD) {
1da177e4
LT		 143 printk(KERN_WARNING "Board #%d (at 0x%lx) is out of range (1 <= x <= %d).\n",
144 boardno, physloc, MAX_BOARD);
145 return 0;
146 }
147
148 if (apbs[boardno - 1].RamIO) {
149 printk(KERN_WARNING "Board #%d (at 0x%lx) conflicts with previous board #%d (at 0x%lx)\n",
150 boardno, physloc, boardno, apbs[boardno-1].PhysIO);
151 return 0;
152 }
153
154 boardno--;
155
156 apbs[boardno].PhysIO = physloc;
157 apbs[boardno].RamIO = loc;
158 init_waitqueue_head(&apbs[boardno].FlagSleepSend);
159 spin_lock_init(&apbs[boardno].mutex);
160 byte_reset_it = readb(loc + RAM_IT_TO_PC);
161
162 numboards++;
163 return boardno + 1;
164}
165
2e611390 166static void __exit applicom_exit(void)
1da177e4 167{
819a3eba 168 unsigned int i;
1da177e4
LT		 169
170 misc_deregister(&ac_miscdev);
171
172 for (i = 0; i < MAX_BOARD; i++) {
173
174 if (!apbs[i].RamIO)
175 continue;
176
177 if (apbs[i].irq)
178 free_irq(apbs[i].irq, &dummy);
179
180 iounmap(apbs[i].RamIO);
181 }
182}
183
2e611390 184static int __init applicom_init(void)
1da177e4
LT		 185{
186 int i, numisa = 0;
187 struct pci_dev *dev = NULL;
188 void __iomem *RamIO;
819a3eba 189 int boardno, ret;
1da177e4
LT		 190
191 printk(KERN_INFO "Applicom driver: $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $\n");
192
193 /* No mem and irq given - check for a PCI card */
194
195 while ( (dev = pci_get_class(PCI_CLASS_OTHERS << 16, dev))) {
196
53a7a1bb 197 if (!pci_match_id(applicom_pci_tbl, dev))
1da177e4
LT		 198 continue;
199
200 if (pci_enable_device(dev))
201 return -EIO;
202
4bdc0d67 203 RamIO = ioremap(pci_resource_start(dev, 0), LEN_RAM_IO);
1da177e4
LT		 204
205 if (!RamIO) {
e29419ff
GKH		 206 printk(KERN_INFO "ac.o: Failed to ioremap PCI memory "
207 "space at 0x%llx\n",
55b29a72 208 (unsigned long long)pci_resource_start(dev, 0));
1da177e4
LT		 209 pci_disable_device(dev);
210 return -EIO;
211 }
212
e29419ff
GKH		 213 printk(KERN_INFO "Applicom %s found at mem 0x%llx, irq %d\n",
214 applicom_pci_devnames[dev->device-1],
55b29a72 215 (unsigned long long)pci_resource_start(dev, 0),
1da177e4
LT		 216 dev->irq);
217
55b29a72
JS		 218 boardno = ac_register_board(pci_resource_start(dev, 0),
219 RamIO, 0);
1da177e4
LT		 220 if (!boardno) {
221 printk(KERN_INFO "ac.o: PCI Applicom device doesn't have correct signature.\n");
222 iounmap(RamIO);
223 pci_disable_device(dev);
224 continue;
225 }
226
0f2ed4c6 227 if (request_irq(dev->irq, &ac_interrupt, IRQF_SHARED, "Applicom PCI", &dummy)) {
1da177e4
LT		 228 printk(KERN_INFO "Could not allocate IRQ %d for PCI Applicom device.\n", dev->irq);
229 iounmap(RamIO);
230 pci_disable_device(dev);
231 apbs[boardno - 1].RamIO = NULL;
232 continue;
233 }
234
235 /* Enable interrupts. */
236
237 writeb(0x40, apbs[boardno - 1].RamIO + RAM_IT_FROM_PC);
238
239 apbs[boardno - 1].irq = dev->irq;
240 }
241
242 /* Finished with PCI cards. If none registered,
243 * and there was no mem/irq specified, exit */
244
245 if (!mem || !irq) {
246 if (numboards)
247 goto fin;
248 else {
249 printk(KERN_INFO "ac.o: No PCI boards found.\n");
250 printk(KERN_INFO "ac.o: For an ISA board you must supply memory and irq parameters.\n");
251 return -ENXIO;
252 }
253 }
254
255 /* Now try the specified ISA cards */
256
257 for (i = 0; i < MAX_ISA_BOARD; i++) {
4bdc0d67 258 RamIO = ioremap(mem + (LEN_RAM_IO * i), LEN_RAM_IO);
1da177e4
LT		 259
260 if (!RamIO) {
261 printk(KERN_INFO "ac.o: Failed to ioremap the ISA card's memory space (slot #%d)\n", i + 1);
262 continue;
263 }
264
265 if (!(boardno = ac_register_board((unsigned long)mem+ (LEN_RAM_IO*i),
266 RamIO,i+1))) {
267 iounmap(RamIO);
268 continue;
269 }
270
271 printk(KERN_NOTICE "Applicom ISA card found at mem 0x%lx, irq %d\n", mem + (LEN_RAM_IO*i), irq);
272
273 if (!numisa) {
0f2ed4c6 274 if (request_irq(irq, &ac_interrupt, IRQF_SHARED, "Applicom ISA", &dummy)) {
1da177e4
LT		 275 printk(KERN_WARNING "Could not allocate IRQ %d for ISA Applicom device.\n", irq);
276 iounmap(RamIO);
277 apbs[boardno - 1].RamIO = NULL;
278 }
279 else
280 apbs[boardno - 1].irq = irq;
281 }
282 else
283 apbs[boardno - 1].irq = 0;
284
285 numisa++;
286 }
287
288 if (!numisa)
819a3eba
CL		 289 printk(KERN_WARNING "ac.o: No valid ISA Applicom boards found "
290 "at mem 0x%lx\n", mem);
1da177e4
LT		 291
292 fin:
293 init_waitqueue_head(&FlagSleepRec);
294
295 WriteErrorCount = 0;
296 ReadErrorCount = 0;
297 DeviceErrorCount = 0;
298
299 if (numboards) {
819a3eba
CL		 300 ret = misc_register(&ac_miscdev);
301 if (ret) {
302 printk(KERN_WARNING "ac.o: Unable to register misc device\n");
303 goto out;
304 }
1da177e4
LT		 305 for (i = 0; i < MAX_BOARD; i++) {
306 int serial;
307 char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
308
309 if (!apbs[i].RamIO)
310 continue;
311
312 for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
313 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
314
315 boardname[serial] = 0;
316
317
318 printk(KERN_INFO "Applicom board %d: %s, PROM V%d.%d",
319 i+1, boardname,
320 (int)(readb(apbs[i].RamIO + VERS) >> 4),
321 (int)(readb(apbs[i].RamIO + VERS) & 0xF));
322
323 serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) +
324 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) +
325 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
326
327 if (serial != 0)
328 printk(" S/N %d\n", serial);
329 else
330 printk("\n");
331 }
332 return 0;
333 }
334
335 else
336 return -ENXIO;
819a3eba
CL		 337
338out:
339 for (i = 0; i < MAX_BOARD; i++) {
340 if (!apbs[i].RamIO)
341 continue;
342 if (apbs[i].irq)
343 free_irq(apbs[i].irq, &dummy);
344 iounmap(apbs[i].RamIO);
345 }
819a3eba 346 return ret;
1da177e4
LT		 347}
348
2e611390
AB		 349module_init(applicom_init);
350module_exit(applicom_exit);
1da177e4 351
1da177e4
LT		 352
353static ssize_t ac_write(struct file *file, const char __user *buf, size_t count, loff_t * ppos)
354{
355 unsigned int NumCard; /* Board number 1 -> 8 */
356 unsigned int IndexCard; /* Index board number 0 -> 7 */
357 unsigned char TicCard; /* Board TIC to send */
358 unsigned long flags; /* Current priority */
359 struct st_ram_io st_loc;
360 struct mailbox tmpmailbox;
361#ifdef DEBUG
362 int c;
363#endif
364 DECLARE_WAITQUEUE(wait, current);
365
366 if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
367 static int warncount = 5;
368 if (warncount) {
369 printk(KERN_INFO "Hmmm. write() of Applicom card, length %zd != expected %zd\n",
370 count, sizeof(struct st_ram_io) + sizeof(struct mailbox));
371 warncount--;
372 }
373 return -EINVAL;
374 }
375
376 if(copy_from_user(&st_loc, buf, sizeof(struct st_ram_io)))
377 return -EFAULT;
378
379 if(copy_from_user(&tmpmailbox, &buf[sizeof(struct st_ram_io)],
380 sizeof(struct mailbox)))
381 return -EFAULT;
382
383 NumCard = st_loc.num_card; /* board number to send */
384 TicCard = st_loc.tic_des_from_pc; /* tic number to send */
385 IndexCard = NumCard - 1;
386
d7ac3c6e
GS		 387 if (IndexCard >= MAX_BOARD)
388 return -EINVAL;
389 IndexCard = array_index_nospec(IndexCard, MAX_BOARD);
390
391 if (!apbs[IndexCard].RamIO)
1da177e4
LT		 392 return -EINVAL;
393
394#ifdef DEBUG
395 printk("Write to applicom card #%d. struct st_ram_io follows:",
396 IndexCard+1);
397
398 for (c = 0; c < sizeof(struct st_ram_io);) {
399
400 printk("\n%5.5X: %2.2X", c, ((unsigned char *) &st_loc)[c]);
401
402 for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
403 printk(" %2.2X", ((unsigned char *) &st_loc)[c]);
404 }
405 }
406
407 printk("\nstruct mailbox follows:");
408
409 for (c = 0; c < sizeof(struct mailbox);) {
410 printk("\n%5.5X: %2.2X", c, ((unsigned char *) &tmpmailbox)[c]);
411
412 for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
413 printk(" %2.2X", ((unsigned char *) &tmpmailbox)[c]);
414 }
415 }
416
417 printk("\n");
418#endif
419
420 spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
421
422 /* Test octet ready correct */
423 if(readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) > 2) {
424 Dummy = readb(apbs[IndexCard].RamIO + VERS);
425 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
426 printk(KERN_WARNING "APPLICOM driver write error board %d, DataFromPcReady = %d\n",
427 IndexCard,(int)readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY));
428 DeviceErrorCount++;
429 return -EIO;
430 }
431
432 /* Place ourselves on the wait queue */
433 set_current_state(TASK_INTERRUPTIBLE);
434 add_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
435
436 /* Check whether the card is ready for us */
437 while (readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) != 0) {
438 Dummy = readb(apbs[IndexCard].RamIO + VERS);
439 /* It's busy. Sleep. */
440
441 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
442 schedule();
443 if (signal_pending(current)) {
444 remove_wait_queue(&apbs[IndexCard].FlagSleepSend,
445 &wait);
446 return -EINTR;
447 }
448 spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
449 set_current_state(TASK_INTERRUPTIBLE);
450 }
451
452 /* We may not have actually slept */
453 set_current_state(TASK_RUNNING);
454 remove_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
455
456 writeb(1, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
457
458 /* Which is best - lock down the pages with rawio and then
459 copy directly, or use bounce buffers? For now we do the latter
460 because it works with 2.2 still */
461 {
462 unsigned char *from = (unsigned char *) &tmpmailbox;
463 void __iomem *to = apbs[IndexCard].RamIO + RAM_FROM_PC;
464 int c;
465
466 for (c = 0; c < sizeof(struct mailbox); c++)
467 writeb(*(from++), to++);
468 }
469
470 writeb(0x20, apbs[IndexCard].RamIO + TIC_OWNER_FROM_PC);
471 writeb(0xff, apbs[IndexCard].RamIO + NUMCARD_OWNER_FROM_PC);
472 writeb(TicCard, apbs[IndexCard].RamIO + TIC_DES_FROM_PC);
473 writeb(NumCard, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
474 writeb(2, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
475 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
476 Dummy = readb(apbs[IndexCard].RamIO + VERS);
477 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
478 return 0;
479}
480
481static int do_ac_read(int IndexCard, char __user *buf,
482 struct st_ram_io *st_loc, struct mailbox *mailbox)
483{
484 void __iomem *from = apbs[IndexCard].RamIO + RAM_TO_PC;
bc20589b 485 unsigned char *to = (unsigned char *)mailbox;
1da177e4
LT		 486#ifdef DEBUG
487 int c;
488#endif
489
490 st_loc->tic_owner_to_pc = readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC);
491 st_loc->numcard_owner_to_pc = readb(apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
492
493
494 {
495 int c;
496
497 for (c = 0; c < sizeof(struct mailbox); c++)
498 *(to++) = readb(from++);
499 }
500 writeb(1, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
501 writeb(1, apbs[IndexCard].RamIO + TYP_ACK_FROM_PC);
502 writeb(IndexCard+1, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
503 writeb(readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC),
504 apbs[IndexCard].RamIO + TIC_ACK_FROM_PC);
505 writeb(2, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
506 writeb(0, apbs[IndexCard].RamIO + DATA_TO_PC_READY);
507 writeb(2, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
508 Dummy = readb(apbs[IndexCard].RamIO + VERS);
509
510#ifdef DEBUG
511 printk("Read from applicom card #%d. struct st_ram_io follows:", NumCard);
512
513 for (c = 0; c < sizeof(struct st_ram_io);) {
514 printk("\n%5.5X: %2.2X", c, ((unsigned char *)st_loc)[c]);
515
516 for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
517 printk(" %2.2X", ((unsigned char *)st_loc)[c]);
518 }
519 }
520
521 printk("\nstruct mailbox follows:");
522
523 for (c = 0; c < sizeof(struct mailbox);) {
524 printk("\n%5.5X: %2.2X", c, ((unsigned char *)mailbox)[c]);
525
526 for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
527 printk(" %2.2X", ((unsigned char *)mailbox)[c]);
528 }
529 }
530 printk("\n");
531#endif
532 return (sizeof(struct st_ram_io) + sizeof(struct mailbox));
533}
534
535static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_t *ptr)
536{
537 unsigned long flags;
538 unsigned int i;
539 unsigned char tmp;
540 int ret = 0;
541 DECLARE_WAITQUEUE(wait, current);
542#ifdef DEBUG
543 int loopcount=0;
544#endif
545 /* No need to ratelimit this. Only root can trigger it anyway */
546 if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
547 printk( KERN_WARNING "Hmmm. read() of Applicom card, length %zd != expected %zd\n",
548 count,sizeof(struct st_ram_io) + sizeof(struct mailbox));
549 return -EINVAL;
550 }
551
552 while(1) {
553 /* Stick ourself on the wait queue */
554 set_current_state(TASK_INTERRUPTIBLE);
555 add_wait_queue(&FlagSleepRec, &wait);
556
557 /* Scan each board, looking for one which has a packet for us */
558 for (i=0; i < MAX_BOARD; i++) {
559 if (!apbs[i].RamIO)
560 continue;
561 spin_lock_irqsave(&apbs[i].mutex, flags);
562
563 tmp = readb(apbs[i].RamIO + DATA_TO_PC_READY);
564
565 if (tmp == 2) {
566 struct st_ram_io st_loc;
567 struct mailbox mailbox;
568
569 /* Got a packet for us */
19714a8a 570 memset(&st_loc, 0, sizeof(st_loc));
1da177e4
LT		 571 ret = do_ac_read(i, buf, &st_loc, &mailbox);
572 spin_unlock_irqrestore(&apbs[i].mutex, flags);
573 set_current_state(TASK_RUNNING);
574 remove_wait_queue(&FlagSleepRec, &wait);
575
576 if (copy_to_user(buf, &st_loc, sizeof(st_loc)))
577 return -EFAULT;
578 if (copy_to_user(buf + sizeof(st_loc), &mailbox, sizeof(mailbox)))
579 return -EFAULT;
580 return tmp;
581 }
582
583 if (tmp > 2) {
584 /* Got an error */
585 Dummy = readb(apbs[i].RamIO + VERS);
586
587 spin_unlock_irqrestore(&apbs[i].mutex, flags);
588 set_current_state(TASK_RUNNING);
589 remove_wait_queue(&FlagSleepRec, &wait);
590
591 printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n",
592 i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
593 DeviceErrorCount++;
594 return -EIO;
595 }
596
597 /* Nothing for us. Try the next board */
598 Dummy = readb(apbs[i].RamIO + VERS);
599 spin_unlock_irqrestore(&apbs[i].mutex, flags);
600
601 } /* per board */
602
603 /* OK - No boards had data for us. Sleep now */
604
605 schedule();
606 remove_wait_queue(&FlagSleepRec, &wait);
607
608 if (signal_pending(current))
609 return -EINTR;
610
611#ifdef DEBUG
612 if (loopcount++ > 2) {
56003191 613 printk(KERN_DEBUG "Looping in ac_read. loopcount %d\n", loopcount);
1da177e4
LT		 614 }
615#endif
616 }
617}
618
7d12e780 619static irqreturn_t ac_interrupt(int vec, void *dev_instance)
1da177e4
LT		 620{
621 unsigned int i;
622 unsigned int FlagInt;
623 unsigned int LoopCount;
624 int handled = 0;
625
626 // printk("Applicom interrupt on IRQ %d occurred\n", vec);
627
628 LoopCount = 0;
629
630 do {
631 FlagInt = 0;
632 for (i = 0; i < MAX_BOARD; i++) {
633
634 /* Skip if this board doesn't exist */
635 if (!apbs[i].RamIO)
636 continue;
637
638 spin_lock(&apbs[i].mutex);
639
640 /* Skip if this board doesn't want attention */
641 if(readb(apbs[i].RamIO + RAM_IT_TO_PC) == 0) {
642 spin_unlock(&apbs[i].mutex);
643 continue;
644 }
645
646 handled = 1;
647 FlagInt = 1;
648 writeb(0, apbs[i].RamIO + RAM_IT_TO_PC);
649
650 if (readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2) {
651 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n",
652 i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
653 DeviceErrorCount++;
654 }
655
656 if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) &&
657 (readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) {
658
659 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n",
660 i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY));
661 DeviceErrorCount++;
662 }
663
664 if (readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2) { /* mailbox sent by the card ? */
665 if (waitqueue_active(&FlagSleepRec)) {
666 wake_up_interruptible(&FlagSleepRec);
667 }
668 }
669
670 if (readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0) { /* ram i/o free for write by pc ? */
671 if (waitqueue_active(&apbs[i].FlagSleepSend)) { /* process sleep during read ? */
672 wake_up_interruptible(&apbs[i].FlagSleepSend);
673 }
674 }
675 Dummy = readb(apbs[i].RamIO + VERS);
676
677 if(readb(apbs[i].RamIO + RAM_IT_TO_PC)) {
678 /* There's another int waiting on this card */
679 spin_unlock(&apbs[i].mutex);
680 i--;
681 } else {
682 spin_unlock(&apbs[i].mutex);
683 }
684 }
685 if (FlagInt)
686 LoopCount = 0;
687 else
688 LoopCount++;
689 } while(LoopCount < 2);
690 return IRQ_RETVAL(handled);
691}
692
693
694
55929332 695static long ac_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1da177e4
LT		 696
697{ /* @ ADG ou ATO selon le cas */
698 int i;
699 unsigned char IndexCard;
700 void __iomem *pmem;
701 int ret = 0;
d7ac3c6e 702 static int warncount = 10;
1da177e4
LT		 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
f67231f8
JL		 710 adgl = memdup_user(argp, sizeof(struct st_ram_io));
711 if (IS_ERR(adgl))
712 return PTR_ERR(adgl);
55929332 713
613655fa 714 mutex_lock(&ac_mutex);
1da177e4
LT		 715 IndexCard = adgl->num_card-1;
716
d7ac3c6e
GS		 717 if (cmd != 6 && IndexCard >= MAX_BOARD)
718 goto err;
719 IndexCard = array_index_nospec(IndexCard, MAX_BOARD);
720
721 if (cmd != 6 && !apbs[IndexCard].RamIO)
722 goto err;
1da177e4
LT		 723
724 switch (cmd) {
725
726 case 0:
727 pmem = apbs[IndexCard].RamIO;
728 for (i = 0; i < sizeof(struct st_ram_io); i++)
729 ((unsigned char *)adgl)[i]=readb(pmem++);
730 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
731 ret = -EFAULT;
732 break;
733 case 1:
734 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
735 for (i = 0; i < 4; i++)
736 adgl->conf_end_test[i] = readb(pmem++);
737 for (i = 0; i < 2; i++)
738 adgl->error_code[i] = readb(pmem++);
739 for (i = 0; i < 4; i++)
740 adgl->parameter_error[i] = readb(pmem++);
741 pmem = apbs[IndexCard].RamIO + VERS;
742 adgl->vers = readb(pmem);
743 pmem = apbs[IndexCard].RamIO + TYPE_CARD;
744 for (i = 0; i < 20; i++)
745 adgl->reserv1[i] = readb(pmem++);
746 *(int *)&adgl->reserv1[20] =
747 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) +
748 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) +
749 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) );
750
751 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
752 ret = -EFAULT;
753 break;
754 case 2:
755 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
756 for (i = 0; i < 10; i++)
757 writeb(0xff, pmem++);
758 writeb(adgl->data_from_pc_ready,
759 apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
760
761 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
762
763 for (i = 0; i < MAX_BOARD; i++) {
764 if (apbs[i].RamIO) {
765 byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC);
766 }
767 }
768 break;
769 case 3:
770 pmem = apbs[IndexCard].RamIO + TIC_DES_FROM_PC;
771 writeb(adgl->tic_des_from_pc, pmem);
772 break;
773 case 4:
774 pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC;
775 adgl->tic_owner_to_pc = readb(pmem++);
776 adgl->numcard_owner_to_pc = readb(pmem);
777 if (copy_to_user(argp, adgl,sizeof(struct st_ram_io)))
778 ret = -EFAULT;
779 break;
780 case 5:
781 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
782 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
783 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
784 writeb(4, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
785 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
786 break;
787 case 6:
788 printk(KERN_INFO "APPLICOM driver release .... V2.8.0 ($Revision: 1.30 $)\n");
789 printk(KERN_INFO "Number of installed boards . %d\n", (int) numboards);
790 printk(KERN_INFO "Segment of board ........... %X\n", (int) mem);
791 printk(KERN_INFO "Interrupt IRQ number ....... %d\n", (int) irq);
792 for (i = 0; i < MAX_BOARD; i++) {
793 int serial;
794 char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
795
796 if (!apbs[i].RamIO)
797 continue;
798
799 for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
800 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
801 boardname[serial] = 0;
802
803 printk(KERN_INFO "Prom version board %d ....... V%d.%d %s",
804 i+1,
2154e0a4
DC		 805 (int)(readb(apbs[i].RamIO + VERS) >> 4),
806 (int)(readb(apbs[i].RamIO + VERS) & 0xF),
1da177e4
LT		 807 boardname);
808
809
810 serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) +
811 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) +
812 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
813
814 if (serial != 0)
815 printk(" S/N %d\n", serial);
816 else
817 printk("\n");
818 }
819 if (DeviceErrorCount != 0)
820 printk(KERN_INFO "DeviceErrorCount ........... %d\n", DeviceErrorCount);
821 if (ReadErrorCount != 0)
822 printk(KERN_INFO "ReadErrorCount ............. %d\n", ReadErrorCount);
823 if (WriteErrorCount != 0)
824 printk(KERN_INFO "WriteErrorCount ............ %d\n", WriteErrorCount);
825 if (waitqueue_active(&FlagSleepRec))
826 printk(KERN_INFO "Process in read pending\n");
827 for (i = 0; i < MAX_BOARD; i++) {
828 if (apbs[i].RamIO && waitqueue_active(&apbs[i].FlagSleepSend))
829 printk(KERN_INFO "Process in write pending board %d\n",i+1);
830 }
831 break;
832 default:
a7be18d4 833 ret = -ENOTTY;
1da177e4
LT		 834 break;
835 }
836 Dummy = readb(apbs[IndexCard].RamIO + VERS);
837 kfree(adgl);
613655fa 838 mutex_unlock(&ac_mutex);
6880149e 839 return ret;
d7ac3c6e
GS		 840
841err:
842 if (warncount) {
843 pr_warn("APPLICOM driver IOCTL, bad board number %d\n",
844 (int)IndexCard + 1);
845 warncount--;
846 }
847 kfree(adgl);
848 mutex_unlock(&ac_mutex);
849 return -EINVAL;
850
1da177e4
LT		 851}
852
Linux 6.x block layer and io_uring tree(s)