Root/drivers/char/applicom.c

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

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