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/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 | |
63 | static DEFINE_MUTEX(ac_mutex); |
64 | static char *applicom_pci_devnames[] = { |
65 | "PCI board", |
66 | "PCI2000IBS / PCI2000CAN", |
67 | "PCI2000PFB" |
68 | }; |
69 | |
70 | static 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 | }; |
76 | MODULE_DEVICE_TABLE(pci, applicom_pci_tbl); |
77 | |
78 | MODULE_AUTHOR("David Woodhouse & Applicom International"); |
79 | MODULE_DESCRIPTION("Driver for Applicom Profibus card"); |
80 | MODULE_LICENSE("GPL"); |
81 | MODULE_ALIAS_MISCDEV(AC_MINOR); |
82 | |
83 | MODULE_SUPPORTED_DEVICE("ac"); |
84 | |
85 | |
86 | static 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 | |
94 | static unsigned int irq = 0; /* interrupt number IRQ */ |
95 | static unsigned long mem = 0; /* physical segment of board */ |
96 | |
97 | module_param(irq, uint, 0); |
98 | MODULE_PARM_DESC(irq, "IRQ of the Applicom board"); |
99 | module_param(mem, ulong, 0); |
100 | MODULE_PARM_DESC(mem, "Shared Memory Address of Applicom board"); |
101 | |
102 | static unsigned int numboards; /* number of installed boards */ |
103 | static volatile unsigned char Dummy; |
104 | static DECLARE_WAIT_QUEUE_HEAD(FlagSleepRec); |
105 | static unsigned int WriteErrorCount; /* number of write error */ |
106 | static unsigned int ReadErrorCount; /* number of read error */ |
107 | static unsigned int DeviceErrorCount; /* number of device error */ |
108 | |
109 | static ssize_t ac_read (struct file *, char __user *, size_t, loff_t *); |
110 | static ssize_t ac_write (struct file *, const char __user *, size_t, loff_t *); |
111 | static long ac_ioctl(struct file *, unsigned int, unsigned long); |
112 | static irqreturn_t ac_interrupt(int, void *); |
113 | |
114 | static 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 | |
122 | static struct miscdevice ac_miscdev = { |
123 | AC_MINOR, |
124 | "ac", |
125 | &ac_fops |
126 | }; |
127 | |
128 | static int dummy; /* dev_id for request_irq() */ |
129 | |
130 | static 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 | |
168 | static 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 | |
186 | static 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 | |
340 | out: |
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 | |
352 | module_init(applicom_init); |
353 | module_exit(applicom_exit); |
354 | |
355 | |
356 | static 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 | |
480 | static 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 | |
534 | static 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 | |
618 | static 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 | |
694 | static 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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Tags:
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v2.6.34-rc5
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