Root/
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/miscdevice.h> |
30 | #include <linux/pci.h> |
31 | #include <linux/wait.h> |
32 | #include <linux/init.h> |
33 | #include <linux/fs.h> |
34 | |
35 | #include <asm/io.h> |
36 | #include <asm/uaccess.h> |
37 | |
38 | #include "applicom.h" |
39 | |
40 | |
41 | /* NOTE: We use for loops with {write,read}b() instead of |
42 | memcpy_{from,to}io throughout this driver. This is because |
43 | the board doesn't correctly handle word accesses - only |
44 | bytes. |
45 | */ |
46 | |
47 | |
48 | #undef DEBUG |
49 | |
50 | #define MAX_BOARD 8 /* maximum of pc board possible */ |
51 | #define MAX_ISA_BOARD 4 |
52 | #define LEN_RAM_IO 0x800 |
53 | #define AC_MINOR 157 |
54 | |
55 | #ifndef PCI_VENDOR_ID_APPLICOM |
56 | #define PCI_VENDOR_ID_APPLICOM 0x1389 |
57 | #define PCI_DEVICE_ID_APPLICOM_PCIGENERIC 0x0001 |
58 | #define PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN 0x0002 |
59 | #define PCI_DEVICE_ID_APPLICOM_PCI2000PFB 0x0003 |
60 | #endif |
61 | |
62 | static char *applicom_pci_devnames[] = { |
63 | "PCI board", |
64 | "PCI2000IBS / PCI2000CAN", |
65 | "PCI2000PFB" |
66 | }; |
67 | |
68 | static struct pci_device_id applicom_pci_tbl[] = { |
69 | { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCIGENERIC) }, |
70 | { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN) }, |
71 | { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000PFB) }, |
72 | { 0 } |
73 | }; |
74 | MODULE_DEVICE_TABLE(pci, applicom_pci_tbl); |
75 | |
76 | MODULE_AUTHOR("David Woodhouse & Applicom International"); |
77 | MODULE_DESCRIPTION("Driver for Applicom Profibus card"); |
78 | MODULE_LICENSE("GPL"); |
79 | MODULE_ALIAS_MISCDEV(AC_MINOR); |
80 | |
81 | MODULE_SUPPORTED_DEVICE("ac"); |
82 | |
83 | |
84 | static 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 | |
92 | static unsigned int irq = 0; /* interrupt number IRQ */ |
93 | static unsigned long mem = 0; /* physical segment of board */ |
94 | |
95 | module_param(irq, uint, 0); |
96 | MODULE_PARM_DESC(irq, "IRQ of the Applicom board"); |
97 | module_param(mem, ulong, 0); |
98 | MODULE_PARM_DESC(mem, "Shared Memory Address of Applicom board"); |
99 | |
100 | static unsigned int numboards; /* number of installed boards */ |
101 | static volatile unsigned char Dummy; |
102 | static DECLARE_WAIT_QUEUE_HEAD(FlagSleepRec); |
103 | static unsigned int WriteErrorCount; /* number of write error */ |
104 | static unsigned int ReadErrorCount; /* number of read error */ |
105 | static unsigned int DeviceErrorCount; /* number of device error */ |
106 | |
107 | static ssize_t ac_read (struct file *, char __user *, size_t, loff_t *); |
108 | static ssize_t ac_write (struct file *, const char __user *, size_t, loff_t *); |
109 | static int ac_ioctl(struct inode *, struct file *, unsigned int, |
110 | unsigned long); |
111 | static irqreturn_t ac_interrupt(int, void *); |
112 | |
113 | static const struct file_operations ac_fops = { |
114 | .owner = THIS_MODULE, |
115 | .llseek = no_llseek, |
116 | .read = ac_read, |
117 | .write = ac_write, |
118 | .ioctl = ac_ioctl, |
119 | }; |
120 | |
121 | static struct miscdevice ac_miscdev = { |
122 | AC_MINOR, |
123 | "ac", |
124 | &ac_fops |
125 | }; |
126 | |
127 | static int dummy; /* dev_id for request_irq() */ |
128 | |
129 | static int ac_register_board(unsigned long physloc, void __iomem *loc, |
130 | unsigned char boardno) |
131 | { |
132 | volatile unsigned char byte_reset_it; |
133 | |
134 | if((readb(loc + CONF_END_TEST) != 0x00) || |
135 | (readb(loc + CONF_END_TEST + 1) != 0x55) || |
136 | (readb(loc + CONF_END_TEST + 2) != 0xAA) || |
137 | (readb(loc + CONF_END_TEST + 3) != 0xFF)) |
138 | return 0; |
139 | |
140 | if (!boardno) |
141 | boardno = readb(loc + NUMCARD_OWNER_TO_PC); |
142 | |
143 | if (!boardno || boardno > MAX_BOARD) { |
144 | printk(KERN_WARNING "Board #%d (at 0x%lx) is out of range (1 <= x <= %d).\n", |
145 | boardno, physloc, MAX_BOARD); |
146 | return 0; |
147 | } |
148 | |
149 | if (apbs[boardno - 1].RamIO) { |
150 | printk(KERN_WARNING "Board #%d (at 0x%lx) conflicts with previous board #%d (at 0x%lx)\n", |
151 | boardno, physloc, boardno, apbs[boardno-1].PhysIO); |
152 | return 0; |
153 | } |
154 | |
155 | boardno--; |
156 | |
157 | apbs[boardno].PhysIO = physloc; |
158 | apbs[boardno].RamIO = loc; |
159 | init_waitqueue_head(&apbs[boardno].FlagSleepSend); |
160 | spin_lock_init(&apbs[boardno].mutex); |
161 | byte_reset_it = readb(loc + RAM_IT_TO_PC); |
162 | |
163 | numboards++; |
164 | return boardno + 1; |
165 | } |
166 | |
167 | static void __exit applicom_exit(void) |
168 | { |
169 | unsigned int i; |
170 | |
171 | misc_deregister(&ac_miscdev); |
172 | |
173 | for (i = 0; i < MAX_BOARD; i++) { |
174 | |
175 | if (!apbs[i].RamIO) |
176 | continue; |
177 | |
178 | if (apbs[i].irq) |
179 | free_irq(apbs[i].irq, &dummy); |
180 | |
181 | iounmap(apbs[i].RamIO); |
182 | } |
183 | } |
184 | |
185 | static int __init applicom_init(void) |
186 | { |
187 | int i, numisa = 0; |
188 | struct pci_dev *dev = NULL; |
189 | void __iomem *RamIO; |
190 | int boardno, ret; |
191 | |
192 | printk(KERN_INFO "Applicom driver: $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $\n"); |
193 | |
194 | /* No mem and irq given - check for a PCI card */ |
195 | |
196 | while ( (dev = pci_get_class(PCI_CLASS_OTHERS << 16, dev))) { |
197 | |
198 | if (!pci_match_id(applicom_pci_tbl, dev)) |
199 | continue; |
200 | |
201 | if (pci_enable_device(dev)) |
202 | return -EIO; |
203 | |
204 | RamIO = ioremap_nocache(pci_resource_start(dev, 0), LEN_RAM_IO); |
205 | |
206 | if (!RamIO) { |
207 | printk(KERN_INFO "ac.o: Failed to ioremap PCI memory " |
208 | "space at 0x%llx\n", |
209 | (unsigned long long)pci_resource_start(dev, 0)); |
210 | pci_disable_device(dev); |
211 | return -EIO; |
212 | } |
213 | |
214 | printk(KERN_INFO "Applicom %s found at mem 0x%llx, irq %d\n", |
215 | applicom_pci_devnames[dev->device-1], |
216 | (unsigned long long)pci_resource_start(dev, 0), |
217 | dev->irq); |
218 | |
219 | boardno = ac_register_board(pci_resource_start(dev, 0), |
220 | RamIO, 0); |
221 | if (!boardno) { |
222 | printk(KERN_INFO "ac.o: PCI Applicom device doesn't have correct signature.\n"); |
223 | iounmap(RamIO); |
224 | pci_disable_device(dev); |
225 | continue; |
226 | } |
227 | |
228 | if (request_irq(dev->irq, &ac_interrupt, IRQF_SHARED, "Applicom PCI", &dummy)) { |
229 | printk(KERN_INFO "Could not allocate IRQ %d for PCI Applicom device.\n", dev->irq); |
230 | iounmap(RamIO); |
231 | pci_disable_device(dev); |
232 | apbs[boardno - 1].RamIO = NULL; |
233 | continue; |
234 | } |
235 | |
236 | /* Enable interrupts. */ |
237 | |
238 | writeb(0x40, apbs[boardno - 1].RamIO + RAM_IT_FROM_PC); |
239 | |
240 | apbs[boardno - 1].irq = dev->irq; |
241 | } |
242 | |
243 | /* Finished with PCI cards. If none registered, |
244 | * and there was no mem/irq specified, exit */ |
245 | |
246 | if (!mem || !irq) { |
247 | if (numboards) |
248 | goto fin; |
249 | else { |
250 | printk(KERN_INFO "ac.o: No PCI boards found.\n"); |
251 | printk(KERN_INFO "ac.o: For an ISA board you must supply memory and irq parameters.\n"); |
252 | return -ENXIO; |
253 | } |
254 | } |
255 | |
256 | /* Now try the specified ISA cards */ |
257 | |
258 | for (i = 0; i < MAX_ISA_BOARD; i++) { |
259 | RamIO = ioremap_nocache(mem + (LEN_RAM_IO * i), LEN_RAM_IO); |
260 | |
261 | if (!RamIO) { |
262 | printk(KERN_INFO "ac.o: Failed to ioremap the ISA card's memory space (slot #%d)\n", i + 1); |
263 | continue; |
264 | } |
265 | |
266 | if (!(boardno = ac_register_board((unsigned long)mem+ (LEN_RAM_IO*i), |
267 | RamIO,i+1))) { |
268 | iounmap(RamIO); |
269 | continue; |
270 | } |
271 | |
272 | printk(KERN_NOTICE "Applicom ISA card found at mem 0x%lx, irq %d\n", mem + (LEN_RAM_IO*i), irq); |
273 | |
274 | if (!numisa) { |
275 | if (request_irq(irq, &ac_interrupt, IRQF_SHARED, "Applicom ISA", &dummy)) { |
276 | printk(KERN_WARNING "Could not allocate IRQ %d for ISA Applicom device.\n", irq); |
277 | iounmap(RamIO); |
278 | apbs[boardno - 1].RamIO = NULL; |
279 | } |
280 | else |
281 | apbs[boardno - 1].irq = irq; |
282 | } |
283 | else |
284 | apbs[boardno - 1].irq = 0; |
285 | |
286 | numisa++; |
287 | } |
288 | |
289 | if (!numisa) |
290 | printk(KERN_WARNING "ac.o: No valid ISA Applicom boards found " |
291 | "at mem 0x%lx\n", mem); |
292 | |
293 | fin: |
294 | init_waitqueue_head(&FlagSleepRec); |
295 | |
296 | WriteErrorCount = 0; |
297 | ReadErrorCount = 0; |
298 | DeviceErrorCount = 0; |
299 | |
300 | if (numboards) { |
301 | ret = misc_register(&ac_miscdev); |
302 | if (ret) { |
303 | printk(KERN_WARNING "ac.o: Unable to register misc device\n"); |
304 | goto out; |
305 | } |
306 | for (i = 0; i < MAX_BOARD; i++) { |
307 | int serial; |
308 | char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1]; |
309 | |
310 | if (!apbs[i].RamIO) |
311 | continue; |
312 | |
313 | for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++) |
314 | boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial); |
315 | |
316 | boardname[serial] = 0; |
317 | |
318 | |
319 | printk(KERN_INFO "Applicom board %d: %s, PROM V%d.%d", |
320 | i+1, boardname, |
321 | (int)(readb(apbs[i].RamIO + VERS) >> 4), |
322 | (int)(readb(apbs[i].RamIO + VERS) & 0xF)); |
323 | |
324 | serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + |
325 | (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + |
326 | (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) ); |
327 | |
328 | if (serial != 0) |
329 | printk(" S/N %d\n", serial); |
330 | else |
331 | printk("\n"); |
332 | } |
333 | return 0; |
334 | } |
335 | |
336 | else |
337 | return -ENXIO; |
338 | |
339 | out: |
340 | for (i = 0; i < MAX_BOARD; i++) { |
341 | if (!apbs[i].RamIO) |
342 | continue; |
343 | if (apbs[i].irq) |
344 | free_irq(apbs[i].irq, &dummy); |
345 | iounmap(apbs[i].RamIO); |
346 | } |
347 | pci_disable_device(dev); |
348 | return ret; |
349 | } |
350 | |
351 | module_init(applicom_init); |
352 | module_exit(applicom_exit); |
353 | |
354 | |
355 | static ssize_t ac_write(struct file *file, const char __user *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 %zd != expected %zd\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 | void __iomem *to = 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 __user *buf, |
480 | struct st_ram_io *st_loc, struct mailbox *mailbox) |
481 | { |
482 | void __iomem *from = apbs[IndexCard].RamIO + RAM_TO_PC; |
483 | unsigned char *to = (unsigned char *)mailbox; |
484 | #ifdef DEBUG |
485 | int c; |
486 | #endif |
487 | |
488 | st_loc->tic_owner_to_pc = readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC); |
489 | st_loc->numcard_owner_to_pc = readb(apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC); |
490 | |
491 | |
492 | { |
493 | int c; |
494 | |
495 | for (c = 0; c < sizeof(struct mailbox); c++) |
496 | *(to++) = readb(from++); |
497 | } |
498 | writeb(1, apbs[IndexCard].RamIO + ACK_FROM_PC_READY); |
499 | writeb(1, apbs[IndexCard].RamIO + TYP_ACK_FROM_PC); |
500 | writeb(IndexCard+1, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC); |
501 | writeb(readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC), |
502 | apbs[IndexCard].RamIO + TIC_ACK_FROM_PC); |
503 | writeb(2, apbs[IndexCard].RamIO + ACK_FROM_PC_READY); |
504 | writeb(0, apbs[IndexCard].RamIO + DATA_TO_PC_READY); |
505 | writeb(2, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); |
506 | Dummy = readb(apbs[IndexCard].RamIO + VERS); |
507 | |
508 | #ifdef DEBUG |
509 | printk("Read from applicom card #%d. struct st_ram_io follows:", NumCard); |
510 | |
511 | for (c = 0; c < sizeof(struct st_ram_io);) { |
512 | printk("\n%5.5X: %2.2X", c, ((unsigned char *)st_loc)[c]); |
513 | |
514 | for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) { |
515 | printk(" %2.2X", ((unsigned char *)st_loc)[c]); |
516 | } |
517 | } |
518 | |
519 | printk("\nstruct mailbox follows:"); |
520 | |
521 | for (c = 0; c < sizeof(struct mailbox);) { |
522 | printk("\n%5.5X: %2.2X", c, ((unsigned char *)mailbox)[c]); |
523 | |
524 | for (c++; c % 8 && c < sizeof(struct mailbox); c++) { |
525 | printk(" %2.2X", ((unsigned char *)mailbox)[c]); |
526 | } |
527 | } |
528 | printk("\n"); |
529 | #endif |
530 | return (sizeof(struct st_ram_io) + sizeof(struct mailbox)); |
531 | } |
532 | |
533 | static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_t *ptr) |
534 | { |
535 | unsigned long flags; |
536 | unsigned int i; |
537 | unsigned char tmp; |
538 | int ret = 0; |
539 | DECLARE_WAITQUEUE(wait, current); |
540 | #ifdef DEBUG |
541 | int loopcount=0; |
542 | #endif |
543 | /* No need to ratelimit this. Only root can trigger it anyway */ |
544 | if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) { |
545 | printk( KERN_WARNING "Hmmm. read() of Applicom card, length %zd != expected %zd\n", |
546 | count,sizeof(struct st_ram_io) + sizeof(struct mailbox)); |
547 | return -EINVAL; |
548 | } |
549 | |
550 | while(1) { |
551 | /* Stick ourself on the wait queue */ |
552 | set_current_state(TASK_INTERRUPTIBLE); |
553 | add_wait_queue(&FlagSleepRec, &wait); |
554 | |
555 | /* Scan each board, looking for one which has a packet for us */ |
556 | for (i=0; i < MAX_BOARD; i++) { |
557 | if (!apbs[i].RamIO) |
558 | continue; |
559 | spin_lock_irqsave(&apbs[i].mutex, flags); |
560 | |
561 | tmp = readb(apbs[i].RamIO + DATA_TO_PC_READY); |
562 | |
563 | if (tmp == 2) { |
564 | struct st_ram_io st_loc; |
565 | struct mailbox mailbox; |
566 | |
567 | /* Got a packet for us */ |
568 | ret = do_ac_read(i, buf, &st_loc, &mailbox); |
569 | spin_unlock_irqrestore(&apbs[i].mutex, flags); |
570 | set_current_state(TASK_RUNNING); |
571 | remove_wait_queue(&FlagSleepRec, &wait); |
572 | |
573 | if (copy_to_user(buf, &st_loc, sizeof(st_loc))) |
574 | return -EFAULT; |
575 | if (copy_to_user(buf + sizeof(st_loc), &mailbox, sizeof(mailbox))) |
576 | return -EFAULT; |
577 | return tmp; |
578 | } |
579 | |
580 | if (tmp > 2) { |
581 | /* Got an error */ |
582 | Dummy = readb(apbs[i].RamIO + VERS); |
583 | |
584 | spin_unlock_irqrestore(&apbs[i].mutex, flags); |
585 | set_current_state(TASK_RUNNING); |
586 | remove_wait_queue(&FlagSleepRec, &wait); |
587 | |
588 | printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n", |
589 | i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY)); |
590 | DeviceErrorCount++; |
591 | return -EIO; |
592 | } |
593 | |
594 | /* Nothing for us. Try the next board */ |
595 | Dummy = readb(apbs[i].RamIO + VERS); |
596 | spin_unlock_irqrestore(&apbs[i].mutex, flags); |
597 | |
598 | } /* per board */ |
599 | |
600 | /* OK - No boards had data for us. Sleep now */ |
601 | |
602 | schedule(); |
603 | remove_wait_queue(&FlagSleepRec, &wait); |
604 | |
605 | if (signal_pending(current)) |
606 | return -EINTR; |
607 | |
608 | #ifdef DEBUG |
609 | if (loopcount++ > 2) { |
610 | printk(KERN_DEBUG "Looping in ac_read. loopcount %d\n", loopcount); |
611 | } |
612 | #endif |
613 | } |
614 | } |
615 | |
616 | static irqreturn_t ac_interrupt(int vec, void *dev_instance) |
617 | { |
618 | unsigned int i; |
619 | unsigned int FlagInt; |
620 | unsigned int LoopCount; |
621 | int handled = 0; |
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 | handled = 1; |
644 | FlagInt = 1; |
645 | writeb(0, apbs[i].RamIO + RAM_IT_TO_PC); |
646 | |
647 | if (readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2) { |
648 | printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n", |
649 | i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY)); |
650 | DeviceErrorCount++; |
651 | } |
652 | |
653 | if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) && |
654 | (readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) { |
655 | |
656 | printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n", |
657 | i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY)); |
658 | DeviceErrorCount++; |
659 | } |
660 | |
661 | if (readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2) { /* mailbox sent by the card ? */ |
662 | if (waitqueue_active(&FlagSleepRec)) { |
663 | wake_up_interruptible(&FlagSleepRec); |
664 | } |
665 | } |
666 | |
667 | if (readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0) { /* ram i/o free for write by pc ? */ |
668 | if (waitqueue_active(&apbs[i].FlagSleepSend)) { /* process sleep during read ? */ |
669 | wake_up_interruptible(&apbs[i].FlagSleepSend); |
670 | } |
671 | } |
672 | Dummy = readb(apbs[i].RamIO + VERS); |
673 | |
674 | if(readb(apbs[i].RamIO + RAM_IT_TO_PC)) { |
675 | /* There's another int waiting on this card */ |
676 | spin_unlock(&apbs[i].mutex); |
677 | i--; |
678 | } else { |
679 | spin_unlock(&apbs[i].mutex); |
680 | } |
681 | } |
682 | if (FlagInt) |
683 | LoopCount = 0; |
684 | else |
685 | LoopCount++; |
686 | } while(LoopCount < 2); |
687 | return IRQ_RETVAL(handled); |
688 | } |
689 | |
690 | |
691 | |
692 | static int ac_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) |
693 | |
694 | { /* @ ADG ou ATO selon le cas */ |
695 | int i; |
696 | unsigned char IndexCard; |
697 | void __iomem *pmem; |
698 | int ret = 0; |
699 | volatile unsigned char byte_reset_it; |
700 | struct st_ram_io *adgl; |
701 | void __user *argp = (void __user *)arg; |
702 | |
703 | /* In general, the device is only openable by root anyway, so we're not |
704 | particularly concerned that bogus ioctls can flood the console. */ |
705 | |
706 | adgl = kmalloc(sizeof(struct st_ram_io), GFP_KERNEL); |
707 | if (!adgl) |
708 | return -ENOMEM; |
709 | |
710 | if (copy_from_user(adgl, argp, sizeof(struct st_ram_io))) { |
711 | kfree(adgl); |
712 | return -EFAULT; |
713 | } |
714 | |
715 | IndexCard = adgl->num_card-1; |
716 | |
717 | if(cmd != 6 && ((IndexCard >= MAX_BOARD) || !apbs[IndexCard].RamIO)) { |
718 | static int warncount = 10; |
719 | if (warncount) { |
720 | printk( KERN_WARNING "APPLICOM driver IOCTL, bad board number %d\n",(int)IndexCard+1); |
721 | warncount--; |
722 | } |
723 | kfree(adgl); |
724 | return -EINVAL; |
725 | } |
726 | |
727 | switch (cmd) { |
728 | |
729 | case 0: |
730 | pmem = apbs[IndexCard].RamIO; |
731 | for (i = 0; i < sizeof(struct st_ram_io); i++) |
732 | ((unsigned char *)adgl)[i]=readb(pmem++); |
733 | if (copy_to_user(argp, adgl, sizeof(struct st_ram_io))) |
734 | ret = -EFAULT; |
735 | break; |
736 | case 1: |
737 | pmem = apbs[IndexCard].RamIO + CONF_END_TEST; |
738 | for (i = 0; i < 4; i++) |
739 | adgl->conf_end_test[i] = readb(pmem++); |
740 | for (i = 0; i < 2; i++) |
741 | adgl->error_code[i] = readb(pmem++); |
742 | for (i = 0; i < 4; i++) |
743 | adgl->parameter_error[i] = readb(pmem++); |
744 | pmem = apbs[IndexCard].RamIO + VERS; |
745 | adgl->vers = readb(pmem); |
746 | pmem = apbs[IndexCard].RamIO + TYPE_CARD; |
747 | for (i = 0; i < 20; i++) |
748 | adgl->reserv1[i] = readb(pmem++); |
749 | *(int *)&adgl->reserv1[20] = |
750 | (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) + |
751 | (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) + |
752 | (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) ); |
753 | |
754 | if (copy_to_user(argp, adgl, sizeof(struct st_ram_io))) |
755 | ret = -EFAULT; |
756 | break; |
757 | case 2: |
758 | pmem = apbs[IndexCard].RamIO + CONF_END_TEST; |
759 | for (i = 0; i < 10; i++) |
760 | writeb(0xff, pmem++); |
761 | writeb(adgl->data_from_pc_ready, |
762 | apbs[IndexCard].RamIO + DATA_FROM_PC_READY); |
763 | |
764 | writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); |
765 | |
766 | for (i = 0; i < MAX_BOARD; i++) { |
767 | if (apbs[i].RamIO) { |
768 | byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC); |
769 | } |
770 | } |
771 | break; |
772 | case 3: |
773 | pmem = apbs[IndexCard].RamIO + TIC_DES_FROM_PC; |
774 | writeb(adgl->tic_des_from_pc, pmem); |
775 | break; |
776 | case 4: |
777 | pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC; |
778 | adgl->tic_owner_to_pc = readb(pmem++); |
779 | adgl->numcard_owner_to_pc = readb(pmem); |
780 | if (copy_to_user(argp, adgl,sizeof(struct st_ram_io))) |
781 | ret = -EFAULT; |
782 | break; |
783 | case 5: |
784 | writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC); |
785 | writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC); |
786 | writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC); |
787 | writeb(4, apbs[IndexCard].RamIO + DATA_FROM_PC_READY); |
788 | writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); |
789 | break; |
790 | case 6: |
791 | printk(KERN_INFO "APPLICOM driver release .... V2.8.0 ($Revision: 1.30 $)\n"); |
792 | printk(KERN_INFO "Number of installed boards . %d\n", (int) numboards); |
793 | printk(KERN_INFO "Segment of board ........... %X\n", (int) mem); |
794 | printk(KERN_INFO "Interrupt IRQ number ....... %d\n", (int) irq); |
795 | for (i = 0; i < MAX_BOARD; i++) { |
796 | int serial; |
797 | char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1]; |
798 | |
799 | if (!apbs[i].RamIO) |
800 | continue; |
801 | |
802 | for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++) |
803 | boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial); |
804 | boardname[serial] = 0; |
805 | |
806 | printk(KERN_INFO "Prom version board %d ....... V%d.%d %s", |
807 | i+1, |
808 | (int)(readb(apbs[IndexCard].RamIO + VERS) >> 4), |
809 | (int)(readb(apbs[IndexCard].RamIO + VERS) & 0xF), |
810 | boardname); |
811 | |
812 | |
813 | serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + |
814 | (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + |
815 | (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) ); |
816 | |
817 | if (serial != 0) |
818 | printk(" S/N %d\n", serial); |
819 | else |
820 | printk("\n"); |
821 | } |
822 | if (DeviceErrorCount != 0) |
823 | printk(KERN_INFO "DeviceErrorCount ........... %d\n", DeviceErrorCount); |
824 | if (ReadErrorCount != 0) |
825 | printk(KERN_INFO "ReadErrorCount ............. %d\n", ReadErrorCount); |
826 | if (WriteErrorCount != 0) |
827 | printk(KERN_INFO "WriteErrorCount ............ %d\n", WriteErrorCount); |
828 | if (waitqueue_active(&FlagSleepRec)) |
829 | printk(KERN_INFO "Process in read pending\n"); |
830 | for (i = 0; i < MAX_BOARD; i++) { |
831 | if (apbs[i].RamIO && waitqueue_active(&apbs[i].FlagSleepSend)) |
832 | printk(KERN_INFO "Process in write pending board %d\n",i+1); |
833 | } |
834 | break; |
835 | default: |
836 | ret = -ENOTTY; |
837 | break; |
838 | } |
839 | Dummy = readb(apbs[IndexCard].RamIO + VERS); |
840 | kfree(adgl); |
841 | return 0; |
842 | } |
843 | |
844 |
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