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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [char/] [applicom.c] - Blame information for rev 1765

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Line No. Rev Author Line
1 1275 phoenix
/* Derived from Applicom driver ac.c for SCO Unix                            */
2
/* Ported by David Woodhouse, Axiom (Cambridge) Ltd.                         */
3
/* dwmw2@redhat.com  30/8/98                                                 */
4
/* $Id: applicom.c,v 1.1.1.1 2004-04-15 02:00:06 phoenix 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/slab.h>
26
#include <asm/errno.h>
27
#include <asm/io.h>
28
#include <asm/uaccess.h>
29
#include <linux/miscdevice.h>
30
#include <linux/pci.h>
31
#include <linux/wait.h>
32
#include <linux/init.h>
33
#include <linux/compatmac.h>
34
 
35
#include "applicom.h"
36
 
37
#if LINUX_VERSION_CODE < 0x20300 
38
/* These probably want adding to <linux/compatmac.h> */
39
#define init_waitqueue_head(x) do { *(x) = NULL; } while (0)
40
#define PCI_BASE_ADDRESS(dev) (dev->base_address[0])
41
#define DECLARE_WAIT_QUEUE_HEAD(x) struct wait_queue *x
42
#define __setup(x,y) /* */
43
#else
44
#define PCI_BASE_ADDRESS(dev) (dev->resource[0].start)
45
#endif
46
 
47
/* NOTE: We use for loops with {write,read}b() instead of
48
   memcpy_{from,to}io throughout this driver. This is because
49
   the board doesn't correctly handle word accesses - only
50
   bytes.
51
*/
52
 
53
 
54
#undef DEBUG
55
 
56
#define MAX_BOARD 8             /* maximum of pc board possible */
57
#define MAX_ISA_BOARD 4
58
#define LEN_RAM_IO 0x800
59
#define AC_MINOR 157
60
 
61
#ifndef PCI_VENDOR_ID_APPLICOM
62
#define PCI_VENDOR_ID_APPLICOM                0x1389
63
#define PCI_DEVICE_ID_APPLICOM_PCIGENERIC     0x0001
64
#define PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN 0x0002
65
#define PCI_DEVICE_ID_APPLICOM_PCI2000PFB     0x0003
66
#endif
67
#define MAX_PCI_DEVICE_NUM 3
68
 
69
static char *applicom_pci_devnames[] = {
70
        "PCI board",
71
        "PCI2000IBS / PCI2000CAN",
72
        "PCI2000PFB"
73
};
74
 
75
static struct pci_device_id applicom_pci_tbl[] = {
76
        { PCI_VENDOR_ID_APPLICOM, PCI_DEVICE_ID_APPLICOM_PCIGENERIC,
77
          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
78
        { PCI_VENDOR_ID_APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN,
79
          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
80
        { PCI_VENDOR_ID_APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000PFB,
81
          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
82
        { 0 }
83
};
84
MODULE_DEVICE_TABLE(pci, applicom_pci_tbl);
85
 
86
MODULE_AUTHOR("David Woodhouse & Applicom International");
87
MODULE_DESCRIPTION("Driver for Applicom Profibus card");
88
MODULE_LICENSE("GPL");
89
MODULE_PARM(irq, "i");
90
MODULE_PARM_DESC(irq, "IRQ of the Applicom board");
91
MODULE_PARM(mem, "i");
92
MODULE_PARM_DESC(mem, "Shared Memory Address of Applicom board");
93
 
94
MODULE_SUPPORTED_DEVICE("ac");
95
 
96
 
97
static struct applicom_board {
98
        unsigned long PhysIO;
99
        unsigned long RamIO;
100
        wait_queue_head_t FlagSleepSend;
101
        long irq;
102
        spinlock_t mutex;
103
} apbs[MAX_BOARD];
104
 
105
static unsigned int irq = 0;     /* interrupt number IRQ       */
106
static unsigned long mem = 0;    /* physical segment of board  */
107
 
108
static unsigned int numboards;  /* number of installed boards */
109
static volatile unsigned char Dummy;
110
static DECLARE_WAIT_QUEUE_HEAD(FlagSleepRec);
111
static unsigned int WriteErrorCount;    /* number of write error      */
112
static unsigned int ReadErrorCount;     /* number of read error       */
113
static unsigned int DeviceErrorCount;   /* number of device error     */
114
 
115
static ssize_t ac_read (struct file *, char *, size_t, loff_t *);
116
static ssize_t ac_write (struct file *, const char *, size_t, loff_t *);
117
static int ac_ioctl(struct inode *, struct file *, unsigned int,
118
                    unsigned long);
119
static void ac_interrupt(int, void *, struct pt_regs *);
120
 
121
static struct file_operations ac_fops = {
122
        owner:THIS_MODULE,
123
        llseek:no_llseek,
124
        read:ac_read,
125
        write:ac_write,
126
        ioctl:ac_ioctl,
127
};
128
 
129
static struct miscdevice ac_miscdev = {
130
        AC_MINOR,
131
        "ac",
132
        &ac_fops
133
};
134
 
135
static int dummy;       /* dev_id for request_irq() */
136
 
137
static int ac_register_board(unsigned long physloc, unsigned long loc,
138
                      unsigned char boardno)
139
{
140
        volatile unsigned char byte_reset_it;
141
 
142
        if((readb(loc + CONF_END_TEST)     != 0x00) ||
143
           (readb(loc + CONF_END_TEST + 1) != 0x55) ||
144
           (readb(loc + CONF_END_TEST + 2) != 0xAA) ||
145
           (readb(loc + CONF_END_TEST + 3) != 0xFF))
146
                return 0;
147
 
148
        if (!boardno)
149
                boardno = readb(loc + NUMCARD_OWNER_TO_PC);
150
 
151
        if (!boardno && boardno > MAX_BOARD) {
152
                printk(KERN_WARNING "Board #%d (at 0x%lx) is out of range (1 <= x <= %d).\n",
153
                       boardno, physloc, MAX_BOARD);
154
                return 0;
155
        }
156
 
157
        if (apbs[boardno - 1].RamIO) {
158
                printk(KERN_WARNING "Board #%d (at 0x%lx) conflicts with previous board #%d (at 0x%lx)\n",
159
                       boardno, physloc, boardno, apbs[boardno-1].PhysIO);
160
                return 0;
161
        }
162
 
163
        boardno--;
164
 
165
        apbs[boardno].PhysIO = physloc;
166
        apbs[boardno].RamIO = loc;
167
        init_waitqueue_head(&apbs[boardno].FlagSleepSend);
168
        spin_lock_init(&apbs[boardno].mutex);
169
        byte_reset_it = readb(loc + RAM_IT_TO_PC);
170
 
171
        numboards++;
172
        return boardno + 1;
173
}
174
 
175
#ifdef MODULE
176
 
177
#define applicom_init init_module
178
 
179
void cleanup_module(void)
180
{
181
        int i;
182
 
183
        misc_deregister(&ac_miscdev);
184
 
185
        for (i = 0; i < MAX_BOARD; i++) {
186
 
187
                if (!apbs[i].RamIO)
188
                        continue;
189
 
190
                iounmap((void *) apbs[i].RamIO);
191
 
192
                if (apbs[i].irq)
193
                        free_irq(apbs[i].irq, &dummy);
194
        }
195
}
196
 
197
#endif                          /* MODULE */
198
 
199
int __init applicom_init(void)
200
{
201
        int i, numisa = 0;
202
        struct pci_dev *dev = NULL;
203
        void *RamIO;
204
        int boardno;
205
 
206
        printk(KERN_INFO "Applicom driver: $Id: applicom.c,v 1.1.1.1 2004-04-15 02:00:06 phoenix Exp $\n");
207
 
208
        /* No mem and irq given - check for a PCI card */
209
 
210
        while ( (dev = pci_find_class(PCI_CLASS_OTHERS << 16, dev))) {
211
 
212
                if (dev->vendor != PCI_VENDOR_ID_APPLICOM)
213
                        continue;
214
 
215
                if (dev->device  > MAX_PCI_DEVICE_NUM || dev->device == 0)
216
                        continue;
217
 
218
                if (pci_enable_device(dev))
219
                        return -EIO;
220
 
221
                RamIO = ioremap(PCI_BASE_ADDRESS(dev), LEN_RAM_IO);
222
 
223
                if (!RamIO) {
224
                        printk(KERN_INFO "ac.o: Failed to ioremap PCI memory space at 0x%lx\n", PCI_BASE_ADDRESS(dev));
225
                        return -EIO;
226
                }
227
 
228
                printk(KERN_INFO "Applicom %s found at mem 0x%lx, irq %d\n",
229
                       applicom_pci_devnames[dev->device-1], PCI_BASE_ADDRESS(dev),
230
                       dev->irq);
231
 
232
                if (!(boardno = ac_register_board(PCI_BASE_ADDRESS(dev),
233
                                                  (unsigned long)RamIO,0))) {
234
                        printk(KERN_INFO "ac.o: PCI Applicom device doesn't have correct signature.\n");
235
                        iounmap(RamIO);
236
                        continue;
237
                }
238
 
239
                if (request_irq(dev->irq, &ac_interrupt, SA_SHIRQ, "Applicom PCI", &dummy)) {
240
                        printk(KERN_INFO "Could not allocate IRQ %d for PCI Applicom device.\n", dev->irq);
241
                        iounmap(RamIO);
242
                        apbs[boardno - 1].RamIO = 0;
243
                        continue;
244
                }
245
 
246
                /* Enable interrupts. */
247
 
248
                writeb(0x40, apbs[boardno - 1].RamIO + RAM_IT_FROM_PC);
249
 
250
                apbs[boardno - 1].irq = dev->irq;
251
        }
252
 
253
        /* Finished with PCI cards. If none registered,
254
         * and there was no mem/irq specified, exit */
255
 
256
        if (!mem || !irq) {
257
                if (numboards)
258
                        goto fin;
259
                else {
260
                        printk(KERN_INFO "ac.o: No PCI boards found.\n");
261
                        printk(KERN_INFO "ac.o: For an ISA board you must supply memory and irq parameters.\n");
262
                        return -ENXIO;
263
                }
264
        }
265
 
266
        /* Now try the specified ISA cards */
267
 
268
#warning "LEAK"
269
        RamIO = ioremap(mem, LEN_RAM_IO * MAX_ISA_BOARD);
270
 
271
        if (!RamIO)
272
                printk(KERN_INFO "ac.o: Failed to ioremap ISA memory space at 0x%lx\n", mem);
273
 
274
        for (i = 0; i < MAX_ISA_BOARD; i++) {
275
                RamIO = ioremap(mem + (LEN_RAM_IO * i), LEN_RAM_IO);
276
 
277
                if (!RamIO) {
278
                        printk(KERN_INFO "ac.o: Failed to ioremap the ISA card's memory space (slot #%d)\n", i + 1);
279
                        continue;
280
                }
281
 
282
                if (!(boardno = ac_register_board((unsigned long)mem+ (LEN_RAM_IO*i),
283
                                                  (unsigned long)RamIO,i+1))) {
284
                        iounmap(RamIO);
285
                        continue;
286
                }
287
 
288
                printk(KERN_NOTICE "Applicom ISA card found at mem 0x%lx, irq %d\n", mem + (LEN_RAM_IO*i), irq);
289
 
290
                if (!numisa) {
291
                        if (request_irq(irq, &ac_interrupt, SA_SHIRQ, "Applicom ISA", &dummy)) {
292
                                printk(KERN_WARNING "Could not allocate IRQ %d for ISA Applicom device.\n", irq);
293
                                iounmap((void *) RamIO);
294
                                apbs[boardno - 1].RamIO = 0;
295
                        }
296
                        apbs[boardno - 1].irq = irq;
297
                }
298
                else
299
                        apbs[boardno - 1].irq = 0;
300
 
301
                numisa++;
302
        }
303
 
304
        if (!numisa)
305
                printk(KERN_WARNING"ac.o: No valid ISA Applicom boards found at mem 0x%lx\n",mem);
306
 
307
 fin:
308
        init_waitqueue_head(&FlagSleepRec);
309
 
310
        WriteErrorCount = 0;
311
        ReadErrorCount = 0;
312
        DeviceErrorCount = 0;
313
 
314
        if (numboards) {
315
                misc_register(&ac_miscdev);
316
                for (i = 0; i < MAX_BOARD; i++) {
317
                        int serial;
318
                        char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
319
 
320
                        if (!apbs[i].RamIO)
321
                                continue;
322
 
323
                        for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
324
                                boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
325
 
326
                        boardname[serial] = 0;
327
 
328
 
329
                        printk(KERN_INFO "Applicom board %d: %s, PROM V%d.%d",
330
                               i+1, boardname,
331
                               (int)(readb(apbs[i].RamIO + VERS) >> 4),
332
                               (int)(readb(apbs[i].RamIO + VERS) & 0xF));
333
 
334
                        serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) +
335
                                (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) +
336
                                (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
337
 
338
                        if (serial != 0)
339
                                printk(" S/N %d\n", serial);
340
                        else
341
                                printk("\n");
342
                }
343
                return 0;
344
        }
345
 
346
        else
347
                return -ENXIO;
348
}
349
 
350
 
351
#ifndef MODULE
352
__initcall(applicom_init);
353
#endif
354
 
355
static ssize_t ac_write(struct file *file, const char *buf, size_t count, loff_t * ppos)
356
{
357
        unsigned int NumCard;   /* Board number 1 -> 8           */
358
        unsigned int IndexCard; /* Index board number 0 -> 7     */
359
        unsigned char TicCard;  /* Board TIC to send             */
360
        unsigned long flags;    /* Current priority              */
361
        struct st_ram_io st_loc;
362
        struct mailbox tmpmailbox;
363
#ifdef DEBUG
364
        int c;
365
#endif
366
        DECLARE_WAITQUEUE(wait, current);
367
 
368
        if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
369
                static int warncount = 5;
370
                if (warncount) {
371
                        printk(KERN_INFO "Hmmm. write() of Applicom card, length %d != expected %d\n",
372
                               count, sizeof(struct st_ram_io) + sizeof(struct mailbox));
373
                        warncount--;
374
                }
375
                return -EINVAL;
376
        }
377
 
378
        if(copy_from_user(&st_loc, buf, sizeof(struct st_ram_io)))
379
                return -EFAULT;
380
 
381
        if(copy_from_user(&tmpmailbox, &buf[sizeof(struct st_ram_io)],
382
                          sizeof(struct mailbox)))
383
                return -EFAULT;
384
 
385
        NumCard = st_loc.num_card;      /* board number to send          */
386
        TicCard = st_loc.tic_des_from_pc;       /* tic number to send            */
387
        IndexCard = NumCard - 1;
388
 
389
        if((NumCard < 1) || (NumCard > MAX_BOARD) || !apbs[IndexCard].RamIO)
390
                return -EINVAL;
391
 
392
#ifdef DEBUG
393
        printk("Write to applicom card #%d. struct st_ram_io follows:",
394
               IndexCard+1);
395
 
396
                for (c = 0; c < sizeof(struct st_ram_io);) {
397
 
398
                        printk("\n%5.5X: %2.2X", c, ((unsigned char *) &st_loc)[c]);
399
 
400
                        for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
401
                                printk(" %2.2X", ((unsigned char *) &st_loc)[c]);
402
                        }
403
                }
404
 
405
                printk("\nstruct mailbox follows:");
406
 
407
                for (c = 0; c < sizeof(struct mailbox);) {
408
                        printk("\n%5.5X: %2.2X", c, ((unsigned char *) &tmpmailbox)[c]);
409
 
410
                        for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
411
                                printk(" %2.2X", ((unsigned char *) &tmpmailbox)[c]);
412
                        }
413
                }
414
 
415
                printk("\n");
416
#endif
417
 
418
        spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
419
 
420
        /* Test octet ready correct */
421
        if(readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) > 2) {
422
                Dummy = readb(apbs[IndexCard].RamIO + VERS);
423
                spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
424
                printk(KERN_WARNING "APPLICOM driver write error board %d, DataFromPcReady = %d\n",
425
                       IndexCard,(int)readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY));
426
                DeviceErrorCount++;
427
                return -EIO;
428
        }
429
 
430
        /* Place ourselves on the wait queue */
431
        set_current_state(TASK_INTERRUPTIBLE);
432
        add_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
433
 
434
        /* Check whether the card is ready for us */
435
        while (readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) != 0) {
436
                Dummy = readb(apbs[IndexCard].RamIO + VERS);
437
                /* It's busy. Sleep. */
438
 
439
                spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
440
                schedule();
441
                if (signal_pending(current)) {
442
                        remove_wait_queue(&apbs[IndexCard].FlagSleepSend,
443
                                          &wait);
444
                        return -EINTR;
445
                }
446
                spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
447
                set_current_state(TASK_INTERRUPTIBLE);
448
        }
449
 
450
        /* We may not have actually slept */
451
        set_current_state(TASK_RUNNING);
452
        remove_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
453
 
454
        writeb(1, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
455
 
456
        /* Which is best - lock down the pages with rawio and then
457
           copy directly, or use bounce buffers? For now we do the latter
458
           because it works with 2.2 still */
459
        {
460
                unsigned char *from = (unsigned char *) &tmpmailbox;
461
                unsigned long to = (unsigned long) apbs[IndexCard].RamIO + RAM_FROM_PC;
462
                int c;
463
 
464
                for (c = 0; c < sizeof(struct mailbox); c++)
465
                        writeb(*(from++), to++);
466
        }
467
 
468
        writeb(0x20, apbs[IndexCard].RamIO + TIC_OWNER_FROM_PC);
469
        writeb(0xff, apbs[IndexCard].RamIO + NUMCARD_OWNER_FROM_PC);
470
        writeb(TicCard, apbs[IndexCard].RamIO + TIC_DES_FROM_PC);
471
        writeb(NumCard, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
472
        writeb(2, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
473
        writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
474
        Dummy = readb(apbs[IndexCard].RamIO + VERS);
475
        spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
476
        return 0;
477
}
478
 
479
static int do_ac_read(int IndexCard, char *buf)
480
{
481
        struct st_ram_io st_loc;
482
        struct mailbox tmpmailbox;      /* bounce buffer - can't copy to user space with cli() */
483
        unsigned long from = (unsigned long)apbs[IndexCard].RamIO + RAM_TO_PC;
484
        unsigned char *to = (unsigned char *)&tmpmailbox;
485
#ifdef DEBUG
486
        int c;
487
#endif
488
 
489
        st_loc.tic_owner_to_pc = readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC);
490
        st_loc.numcard_owner_to_pc = readb(apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
491
 
492
 
493
        {
494
                int c;
495
 
496
                for (c = 0; c < sizeof(struct mailbox); c++)
497
                        *(to++) = readb(from++);
498
        }
499
        writeb(1, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
500
        writeb(1, apbs[IndexCard].RamIO + TYP_ACK_FROM_PC);
501
        writeb(IndexCard+1, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
502
        writeb(readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC),
503
               apbs[IndexCard].RamIO + TIC_ACK_FROM_PC);
504
        writeb(2, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
505
        writeb(0, apbs[IndexCard].RamIO + DATA_TO_PC_READY);
506
        writeb(2, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
507
        Dummy = readb(apbs[IndexCard].RamIO + VERS);
508
 
509
#ifdef DEBUG
510
                printk("Read from applicom card #%d. struct st_ram_io follows:", NumCard);
511
 
512
                for (c = 0; c < sizeof(struct st_ram_io);) {
513
                        printk("\n%5.5X: %2.2X", c, ((unsigned char *) &st_loc)[c]);
514
 
515
                        for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
516
                                printk(" %2.2X", ((unsigned char *) &st_loc)[c]);
517
                        }
518
                }
519
 
520
                printk("\nstruct mailbox follows:");
521
 
522
                for (c = 0; c < sizeof(struct mailbox);) {
523
                        printk("\n%5.5X: %2.2X", c, ((unsigned char *) &tmpmailbox)[c]);
524
 
525
                        for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
526
                                printk(" %2.2X", ((unsigned char *) &tmpmailbox)[c]);
527
                        }
528
                }
529
                printk("\n");
530
#endif
531
 
532
#warning "Je suis stupide. DW. - copy*user in cli"
533
 
534
        if (copy_to_user(buf, &st_loc, sizeof(struct st_ram_io)))
535
                return -EFAULT;
536
        if (copy_to_user(&buf[sizeof(struct st_ram_io)], &tmpmailbox, sizeof(struct mailbox)))
537
                return -EFAULT;
538
 
539
        return (sizeof(struct st_ram_io) + sizeof(struct mailbox));
540
}
541
 
542
static ssize_t ac_read (struct file *filp, char *buf, size_t count, loff_t *ptr)
543
{
544
        unsigned long flags;
545
        unsigned int i;
546
        unsigned char tmp;
547
        int ret = 0;
548
        DECLARE_WAITQUEUE(wait, current);
549
#ifdef DEBUG
550
        int loopcount=0;
551
#endif
552
        /* No need to ratelimit this. Only root can trigger it anyway */
553
        if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
554
                printk( KERN_WARNING "Hmmm. read() of Applicom card, length %d != expected %d\n",
555
                        count,sizeof(struct st_ram_io) + sizeof(struct mailbox));
556
                return -EINVAL;
557
        }
558
 
559
        while(1) {
560
                /* Stick ourself on the wait queue */
561
                set_current_state(TASK_INTERRUPTIBLE);
562
                add_wait_queue(&FlagSleepRec, &wait);
563
 
564
                /* Scan each board, looking for one which has a packet for us */
565
                for (i=0; i < MAX_BOARD; i++) {
566
                        if (!apbs[i].RamIO)
567
                                continue;
568
                        spin_lock_irqsave(&apbs[i].mutex, flags);
569
 
570
                        tmp = readb(apbs[i].RamIO + DATA_TO_PC_READY);
571
 
572
                        if (tmp == 2) {
573
                                /* Got a packet for us */
574
                                ret = do_ac_read(i, buf);
575
                                spin_unlock_irqrestore(&apbs[i].mutex, flags);
576
                                set_current_state(TASK_RUNNING);
577
                                remove_wait_queue(&FlagSleepRec, &wait);
578
                                return tmp;
579
                        }
580
 
581
                        if (tmp > 2) {
582
                                /* Got an error */
583
                                Dummy = readb(apbs[i].RamIO + VERS);
584
 
585
                                spin_unlock_irqrestore(&apbs[i].mutex, flags);
586
                                set_current_state(TASK_RUNNING);
587
                                remove_wait_queue(&FlagSleepRec, &wait);
588
 
589
                                printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n",
590
                                       i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
591
                                DeviceErrorCount++;
592
                                return -EIO;
593
                        }
594
 
595
                        /* Nothing for us. Try the next board */
596
                        Dummy = readb(apbs[i].RamIO + VERS);
597
                        spin_unlock_irqrestore(&apbs[i].mutex, flags);
598
 
599
                } /* per board */
600
 
601
                /* OK - No boards had data for us. Sleep now */
602
 
603
                schedule();
604
                remove_wait_queue(&FlagSleepRec, &wait);
605
 
606
                if (signal_pending(current))
607
                        return -EINTR;
608
 
609
#ifdef DEBUG
610
                if (loopcount++ > 2) {
611
                        printk("Looping in ac_read. loopcount %d\n", loopcount);
612
                }
613
#endif
614
        }
615
}
616
 
617
static void ac_interrupt(int vec, void *dev_instance, struct pt_regs *regs)
618
{
619
        unsigned int i;
620
        unsigned int FlagInt;
621
        unsigned int LoopCount;
622
 
623
        //    printk("Applicom interrupt on IRQ %d occurred\n", vec);
624
 
625
        LoopCount = 0;
626
 
627
        do {
628
                FlagInt = 0;
629
                for (i = 0; i < MAX_BOARD; i++) {
630
 
631
                        /* Skip if this board doesn't exist */
632
                        if (!apbs[i].RamIO)
633
                                continue;
634
 
635
                        spin_lock(&apbs[i].mutex);
636
 
637
                        /* Skip if this board doesn't want attention */
638
                        if(readb(apbs[i].RamIO + RAM_IT_TO_PC) == 0) {
639
                                spin_unlock(&apbs[i].mutex);
640
                                continue;
641
                        }
642
 
643
                        FlagInt = 1;
644
                        writeb(0, apbs[i].RamIO + RAM_IT_TO_PC);
645
 
646
                        if (readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2) {
647
                                printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n",
648
                                       i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
649
                                DeviceErrorCount++;
650
                        }
651
 
652
                        if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) &&
653
                           (readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) {
654
 
655
                                printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n",
656
                                       i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY));
657
                                DeviceErrorCount++;
658
                        }
659
 
660
                        if (readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2) {     /* mailbox sent by the card ?   */
661
                                if (waitqueue_active(&FlagSleepRec)) {
662
                                wake_up_interruptible(&FlagSleepRec);
663
                        }
664
                        }
665
 
666
                        if (readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0) {    /* ram i/o free for write by pc ? */
667
                                if (waitqueue_active(&apbs[i].FlagSleepSend)) { /* process sleep during read ?    */
668
                                        wake_up_interruptible(&apbs[i].FlagSleepSend);
669
                                }
670
                        }
671
                        Dummy = readb(apbs[i].RamIO + VERS);
672
 
673
                        if(readb(apbs[i].RamIO + RAM_IT_TO_PC)) {
674
                                /* There's another int waiting on this card */
675
                                spin_unlock(&apbs[i].mutex);
676
                                i--;
677
                        } else {
678
                                spin_unlock(&apbs[i].mutex);
679
                        }
680
                }
681
                if (FlagInt)
682
                        LoopCount = 0;
683
                else
684
                        LoopCount++;
685
        } while(LoopCount < 2);
686
}
687
 
688
 
689
 
690
static int ac_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
691
 
692
{                               /* @ ADG ou ATO selon le cas */
693
        int i;
694
        unsigned char IndexCard;
695
        unsigned long pmem;
696
        int ret = 0;
697
        volatile unsigned char byte_reset_it;
698
        struct st_ram_io *adgl;
699
 
700
        /* In general, the device is only openable by root anyway, so we're not
701
           particularly concerned that bogus ioctls can flood the console. */
702
 
703
        adgl = kmalloc(sizeof(struct st_ram_io), GFP_KERNEL);
704
        if (!adgl)
705
                return -ENOMEM;
706
 
707
        if (copy_from_user(adgl, (void *)arg,sizeof(struct st_ram_io))) {
708
                kfree(adgl);
709
                return -EFAULT;
710
        }
711
 
712
        IndexCard = adgl->num_card-1;
713
 
714
        if(cmd != 0 && cmd != 6 &&
715
           ((IndexCard >= MAX_BOARD) || !apbs[IndexCard].RamIO)) {
716
                static int warncount = 10;
717
                if (warncount) {
718
                        printk( KERN_WARNING "APPLICOM driver IOCTL, bad board number %d\n",(int)IndexCard+1);
719
                        warncount--;
720
                }
721
                kfree(adgl);
722
                return -EINVAL;
723
        }
724
 
725
        switch (cmd) {
726
 
727
        case 0:
728
                pmem = apbs[IndexCard].RamIO;
729
                for (i = 0; i < sizeof(struct st_ram_io); i++)
730
                        ((unsigned char *)adgl)[i]=readb(pmem++);
731
                if (copy_to_user((void *)arg, adgl, sizeof(struct st_ram_io)))
732
                        ret = -EFAULT;
733
                break;
734
        case 1:
735
                pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
736
                for (i = 0; i < 4; i++)
737
                        adgl->conf_end_test[i] = readb(pmem++);
738
                for (i = 0; i < 2; i++)
739
                        adgl->error_code[i] = readb(pmem++);
740
                for (i = 0; i < 4; i++)
741
                        adgl->parameter_error[i] = readb(pmem++);
742
                pmem = apbs[IndexCard].RamIO + VERS;
743
                adgl->vers = readb(pmem);
744
                pmem = apbs[IndexCard].RamIO + TYPE_CARD;
745
                for (i = 0; i < 20; i++)
746
                        adgl->reserv1[i] = readb(pmem++);
747
                *(int *)&adgl->reserv1[20] =
748
                        (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) +
749
                        (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) +
750
                        (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) );
751
 
752
                if (copy_to_user((void *)arg, adgl, sizeof(struct st_ram_io)))
753
                        ret = -EFAULT;
754
                break;
755
        case 2:
756
                pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
757
                for (i = 0; i < 10; i++)
758
                        writeb(0xff, pmem++);
759
                writeb(adgl->data_from_pc_ready,
760
                       apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
761
 
762
                writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
763
 
764
                for (i = 0; i < MAX_BOARD; i++) {
765
                        if (apbs[i].RamIO) {
766
                                byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC);
767
                        }
768
                }
769
                break;
770
        case 3:
771
                pmem = apbs[IndexCard].RamIO + TIC_DES_FROM_PC;
772
                writeb(adgl->tic_des_from_pc, pmem);
773
                break;
774
        case 4:
775
                pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC;
776
                adgl->tic_owner_to_pc     = readb(pmem++);
777
                adgl->numcard_owner_to_pc = readb(pmem);
778
                if (copy_to_user((void *)arg, adgl,sizeof(struct st_ram_io)))
779
                        ret = -EFAULT;
780
                break;
781
        case 5:
782
                writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
783
                writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
784
                writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
785
                writeb(4, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
786
                writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
787
                break;
788
        case 6:
789
                printk(KERN_INFO "APPLICOM driver release .... V2.8.0 ($Revision: 1.1.1.1 $)\n");
790
                printk(KERN_INFO "Number of installed boards . %d\n", (int) numboards);
791
                printk(KERN_INFO "Segment of board ........... %X\n", (int) mem);
792
                printk(KERN_INFO "Interrupt IRQ number ....... %d\n", (int) irq);
793
                for (i = 0; i < MAX_BOARD; i++) {
794
                        int serial;
795
                        char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
796
 
797
                        if (!apbs[i].RamIO)
798
                                continue;
799
 
800
                        for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
801
                                boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
802
                        boardname[serial] = 0;
803
 
804
                        printk(KERN_INFO "Prom version board %d ....... V%d.%d %s",
805
                               i+1,
806
                               (int)(readb(apbs[IndexCard].RamIO + VERS) >> 4),
807
                               (int)(readb(apbs[IndexCard].RamIO + VERS) & 0xF),
808
                               boardname);
809
 
810
 
811
                        serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) +
812
                                (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) +
813
                                (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
814
 
815
                        if (serial != 0)
816
                                printk(" S/N %d\n", serial);
817
                        else
818
                                printk("\n");
819
                }
820
                if (DeviceErrorCount != 0)
821
                        printk(KERN_INFO "DeviceErrorCount ........... %d\n", DeviceErrorCount);
822
                if (ReadErrorCount != 0)
823
                        printk(KERN_INFO "ReadErrorCount ............. %d\n", ReadErrorCount);
824
                if (WriteErrorCount != 0)
825
                        printk(KERN_INFO "WriteErrorCount ............ %d\n", WriteErrorCount);
826
                if (waitqueue_active(&FlagSleepRec))
827
                        printk(KERN_INFO "Process in read pending\n");
828
                for (i = 0; i < MAX_BOARD; i++) {
829
                        if (apbs[i].RamIO && waitqueue_active(&apbs[i].FlagSleepSend))
830
                                printk(KERN_INFO "Process in write pending board %d\n",i+1);
831
                }
832
                break;
833
        default:
834
                printk(KERN_INFO "APPLICOM driver ioctl, unknown function code %d\n",cmd) ;
835
                ret = -EINVAL;
836
                break;
837
        }
838
        Dummy = readb(apbs[IndexCard].RamIO + VERS);
839
        kfree(adgl);
840
        return 0;
841
}
842
 
843
#ifndef MODULE
844
static int __init applicom_setup(char *str)
845
{
846
        int ints[4];
847
 
848
        (void) get_options(str, 4, ints);
849
 
850
        if (ints[0] > 2) {
851
                printk(KERN_WARNING "Too many arguments to 'applicom=', expected mem,irq only.\n");
852
        }
853
 
854
        if (ints[0] < 2) {
855
                printk(KERN_INFO"applicom numargs: %d\n", ints[0]);
856
                return 0;
857
        }
858
 
859
        mem = ints[1];
860
        irq = ints[2];
861
        return 1;
862
}
863
 
864
__setup("applicom=", applicom_setup);
865
 
866
#endif                          /* MODULE */
867
 

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