1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* Derived from Applicom driver ac.c for SCO Unix */ |
3 | /* Ported by David Woodhouse, Axiom (Cambridge) Ltd. */ |
4 | /* dwmw2@infradead.org 30/8/98 */ |
5 | /* $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $ */ |
6 | /* This module is for Linux 2.1 and 2.2 series kernels. */ |
7 | /*****************************************************************************/ |
8 | /* J PAGET 18/02/94 passage V2.4.2 ioctl avec code 2 reset to les interrupt */ |
9 | /* ceci pour reseter correctement apres une sortie sauvage */ |
10 | /* J PAGET 02/05/94 passage V2.4.3 dans le traitement de d'interruption, */ |
11 | /* LoopCount n'etait pas initialise a 0. */ |
12 | /* F LAFORSE 04/07/95 version V2.6.0 lecture bidon apres acces a une carte */ |
13 | /* pour liberer le bus */ |
14 | /* J.PAGET 19/11/95 version V2.6.1 Nombre, addresse,irq n'est plus configure */ |
15 | /* et passe en argument a acinit, mais est scrute sur le bus pour s'adapter */ |
16 | /* au nombre de cartes presentes sur le bus. IOCL code 6 affichait V2.4.3 */ |
17 | /* F.LAFORSE 28/11/95 creation de fichiers acXX.o avec les differentes */ |
18 | /* addresses de base des cartes, IOCTL 6 plus complet */ |
19 | /* J.PAGET le 19/08/96 copie de la version V2.6 en V2.8.0 sans modification */ |
20 | /* de code autre que le texte V2.6.1 en V2.8.0 */ |
21 | /*****************************************************************************/ |
22 | |
23 | |
24 | #include <linux/kernel.h> |
25 | #include <linux/module.h> |
26 | #include <linux/interrupt.h> |
27 | #include <linux/sched/signal.h> |
28 | #include <linux/slab.h> |
29 | #include <linux/errno.h> |
30 | #include <linux/mutex.h> |
31 | #include <linux/miscdevice.h> |
32 | #include <linux/pci.h> |
33 | #include <linux/wait.h> |
34 | #include <linux/init.h> |
35 | #include <linux/fs.h> |
36 | #include <linux/nospec.h> |
37 | |
38 | #include <asm/io.h> |
39 | #include <linux/uaccess.h> |
40 | |
41 | #include "applicom.h" |
42 | |
43 | |
44 | /* NOTE: We use for loops with {write,read}b() instead of |
45 | memcpy_{from,to}io throughout this driver. This is because |
46 | the board doesn't correctly handle word accesses - only |
47 | bytes. |
48 | */ |
49 | |
50 | |
51 | #undef DEBUG |
52 | |
53 | #define MAX_BOARD 8 /* maximum of pc board possible */ |
54 | #define MAX_ISA_BOARD 4 |
55 | #define LEN_RAM_IO 0x800 |
56 | |
57 | #ifndef PCI_VENDOR_ID_APPLICOM |
58 | #define PCI_VENDOR_ID_APPLICOM 0x1389 |
59 | #define PCI_DEVICE_ID_APPLICOM_PCIGENERIC 0x0001 |
60 | #define PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN 0x0002 |
61 | #define PCI_DEVICE_ID_APPLICOM_PCI2000PFB 0x0003 |
62 | #endif |
63 | |
64 | static DEFINE_MUTEX(ac_mutex); |
65 | static char *applicom_pci_devnames[] = { |
66 | "PCI board" , |
67 | "PCI2000IBS / PCI2000CAN" , |
68 | "PCI2000PFB" |
69 | }; |
70 | |
71 | static const struct pci_device_id applicom_pci_tbl[] = { |
72 | { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCIGENERIC) }, |
73 | { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN) }, |
74 | { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000PFB) }, |
75 | { 0 } |
76 | }; |
77 | MODULE_DEVICE_TABLE(pci, applicom_pci_tbl); |
78 | |
79 | MODULE_AUTHOR("David Woodhouse & Applicom International" ); |
80 | MODULE_DESCRIPTION("Driver for Applicom Profibus card" ); |
81 | MODULE_LICENSE("GPL" ); |
82 | MODULE_ALIAS_MISCDEV(AC_MINOR); |
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; /* interrupt number IRQ */ |
93 | static unsigned long mem; /* physical segment of board */ |
94 | |
95 | module_param_hw(irq, uint, irq, 0); |
96 | MODULE_PARM_DESC(irq, "IRQ of the Applicom board" ); |
97 | module_param_hw(mem, ulong, iomem, 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 long ac_ioctl(struct file *, unsigned int, unsigned long); |
110 | static irqreturn_t ac_interrupt(int, void *); |
111 | |
112 | static const struct file_operations ac_fops = { |
113 | .owner = THIS_MODULE, |
114 | .llseek = no_llseek, |
115 | .read = ac_read, |
116 | .write = ac_write, |
117 | .unlocked_ioctl = ac_ioctl, |
118 | }; |
119 | |
120 | static struct miscdevice ac_miscdev = { |
121 | AC_MINOR, |
122 | "ac" , |
123 | &ac_fops |
124 | }; |
125 | |
126 | static int dummy; /* dev_id for request_irq() */ |
127 | |
128 | static int ac_register_board(unsigned long physloc, void __iomem *loc, |
129 | unsigned char boardno) |
130 | { |
131 | volatile unsigned char byte_reset_it; |
132 | |
133 | if((readb(addr: loc + CONF_END_TEST) != 0x00) || |
134 | (readb(addr: loc + CONF_END_TEST + 1) != 0x55) || |
135 | (readb(addr: loc + CONF_END_TEST + 2) != 0xAA) || |
136 | (readb(addr: loc + CONF_END_TEST + 3) != 0xFF)) |
137 | return 0; |
138 | |
139 | if (!boardno) |
140 | boardno = readb(addr: loc + NUMCARD_OWNER_TO_PC); |
141 | |
142 | if (!boardno || boardno > MAX_BOARD) { |
143 | printk(KERN_WARNING "Board #%d (at 0x%lx) is out of range (1 <= x <= %d).\n" , |
144 | boardno, physloc, MAX_BOARD); |
145 | return 0; |
146 | } |
147 | |
148 | if (apbs[boardno - 1].RamIO) { |
149 | printk(KERN_WARNING "Board #%d (at 0x%lx) conflicts with previous board #%d (at 0x%lx)\n" , |
150 | boardno, physloc, boardno, apbs[boardno-1].PhysIO); |
151 | return 0; |
152 | } |
153 | |
154 | boardno--; |
155 | |
156 | apbs[boardno].PhysIO = physloc; |
157 | apbs[boardno].RamIO = loc; |
158 | init_waitqueue_head(&apbs[boardno].FlagSleepSend); |
159 | spin_lock_init(&apbs[boardno].mutex); |
160 | byte_reset_it = readb(addr: loc + RAM_IT_TO_PC); |
161 | |
162 | numboards++; |
163 | return boardno + 1; |
164 | } |
165 | |
166 | static void __exit applicom_exit(void) |
167 | { |
168 | unsigned int i; |
169 | |
170 | misc_deregister(misc: &ac_miscdev); |
171 | |
172 | for (i = 0; i < MAX_BOARD; i++) { |
173 | |
174 | if (!apbs[i].RamIO) |
175 | continue; |
176 | |
177 | if (apbs[i].irq) |
178 | free_irq(apbs[i].irq, &dummy); |
179 | |
180 | iounmap(addr: apbs[i].RamIO); |
181 | } |
182 | } |
183 | |
184 | static int __init applicom_init(void) |
185 | { |
186 | int i, numisa = 0; |
187 | struct pci_dev *dev = NULL; |
188 | void __iomem *RamIO; |
189 | int boardno, ret; |
190 | |
191 | printk(KERN_INFO "Applicom driver: $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $\n" ); |
192 | |
193 | /* No mem and irq given - check for a PCI card */ |
194 | |
195 | while ( (dev = pci_get_class(PCI_CLASS_OTHERS << 16, from: dev))) { |
196 | |
197 | if (!pci_match_id(ids: applicom_pci_tbl, dev)) |
198 | continue; |
199 | |
200 | if (pci_enable_device(dev)) { |
201 | pci_dev_put(dev); |
202 | return -EIO; |
203 | } |
204 | |
205 | RamIO = ioremap(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 | pci_dev_put(dev); |
213 | return -EIO; |
214 | } |
215 | |
216 | printk(KERN_INFO "Applicom %s found at mem 0x%llx, irq %d\n" , |
217 | applicom_pci_devnames[dev->device-1], |
218 | (unsigned long long)pci_resource_start(dev, 0), |
219 | dev->irq); |
220 | |
221 | boardno = ac_register_board(pci_resource_start(dev, 0), |
222 | loc: RamIO, boardno: 0); |
223 | if (!boardno) { |
224 | printk(KERN_INFO "ac.o: PCI Applicom device doesn't have correct signature.\n" ); |
225 | iounmap(addr: RamIO); |
226 | pci_disable_device(dev); |
227 | continue; |
228 | } |
229 | |
230 | if (request_irq(irq: dev->irq, handler: &ac_interrupt, IRQF_SHARED, name: "Applicom PCI" , dev: &dummy)) { |
231 | printk(KERN_INFO "Could not allocate IRQ %d for PCI Applicom device.\n" , dev->irq); |
232 | iounmap(addr: RamIO); |
233 | pci_disable_device(dev); |
234 | apbs[boardno - 1].RamIO = NULL; |
235 | continue; |
236 | } |
237 | |
238 | /* Enable interrupts. */ |
239 | |
240 | writeb(val: 0x40, addr: apbs[boardno - 1].RamIO + RAM_IT_FROM_PC); |
241 | |
242 | apbs[boardno - 1].irq = dev->irq; |
243 | } |
244 | |
245 | /* Finished with PCI cards. If none registered, |
246 | * and there was no mem/irq specified, exit */ |
247 | |
248 | if (!mem || !irq) { |
249 | if (numboards) |
250 | goto fin; |
251 | else { |
252 | printk(KERN_INFO "ac.o: No PCI boards found.\n" ); |
253 | printk(KERN_INFO "ac.o: For an ISA board you must supply memory and irq parameters.\n" ); |
254 | return -ENXIO; |
255 | } |
256 | } |
257 | |
258 | /* Now try the specified ISA cards */ |
259 | |
260 | for (i = 0; i < MAX_ISA_BOARD; i++) { |
261 | RamIO = ioremap(offset: mem + (LEN_RAM_IO * i), LEN_RAM_IO); |
262 | |
263 | if (!RamIO) { |
264 | printk(KERN_INFO "ac.o: Failed to ioremap the ISA card's memory space (slot #%d)\n" , i + 1); |
265 | continue; |
266 | } |
267 | |
268 | if (!(boardno = ac_register_board(physloc: (unsigned long)mem+ (LEN_RAM_IO*i), |
269 | loc: RamIO,boardno: i+1))) { |
270 | iounmap(addr: RamIO); |
271 | continue; |
272 | } |
273 | |
274 | printk(KERN_NOTICE "Applicom ISA card found at mem 0x%lx, irq %d\n" , mem + (LEN_RAM_IO*i), irq); |
275 | |
276 | if (!numisa) { |
277 | if (request_irq(irq, handler: &ac_interrupt, IRQF_SHARED, name: "Applicom ISA" , dev: &dummy)) { |
278 | printk(KERN_WARNING "Could not allocate IRQ %d for ISA Applicom device.\n" , irq); |
279 | iounmap(addr: RamIO); |
280 | apbs[boardno - 1].RamIO = NULL; |
281 | } |
282 | else |
283 | apbs[boardno - 1].irq = irq; |
284 | } |
285 | else |
286 | apbs[boardno - 1].irq = 0; |
287 | |
288 | numisa++; |
289 | } |
290 | |
291 | if (!numisa) |
292 | printk(KERN_WARNING "ac.o: No valid ISA Applicom boards found " |
293 | "at mem 0x%lx\n" , mem); |
294 | |
295 | fin: |
296 | init_waitqueue_head(&FlagSleepRec); |
297 | |
298 | WriteErrorCount = 0; |
299 | ReadErrorCount = 0; |
300 | DeviceErrorCount = 0; |
301 | |
302 | if (numboards) { |
303 | ret = misc_register(misc: &ac_miscdev); |
304 | if (ret) { |
305 | printk(KERN_WARNING "ac.o: Unable to register misc device\n" ); |
306 | goto out; |
307 | } |
308 | for (i = 0; i < MAX_BOARD; i++) { |
309 | int serial; |
310 | char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1]; |
311 | |
312 | if (!apbs[i].RamIO) |
313 | continue; |
314 | |
315 | for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++) |
316 | boardname[serial] = readb(addr: apbs[i].RamIO + TYPE_CARD + serial); |
317 | |
318 | boardname[serial] = 0; |
319 | |
320 | |
321 | printk(KERN_INFO "Applicom board %d: %s, PROM V%d.%d" , |
322 | i+1, boardname, |
323 | (int)(readb(apbs[i].RamIO + VERS) >> 4), |
324 | (int)(readb(apbs[i].RamIO + VERS) & 0xF)); |
325 | |
326 | serial = (readb(addr: apbs[i].RamIO + SERIAL_NUMBER) << 16) + |
327 | (readb(addr: apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + |
328 | (readb(addr: apbs[i].RamIO + SERIAL_NUMBER + 2) ); |
329 | |
330 | if (serial != 0) |
331 | printk(" S/N %d\n" , serial); |
332 | else |
333 | printk("\n" ); |
334 | } |
335 | return 0; |
336 | } |
337 | |
338 | else |
339 | return -ENXIO; |
340 | |
341 | out: |
342 | for (i = 0; i < MAX_BOARD; i++) { |
343 | if (!apbs[i].RamIO) |
344 | continue; |
345 | if (apbs[i].irq) |
346 | free_irq(apbs[i].irq, &dummy); |
347 | iounmap(addr: apbs[i].RamIO); |
348 | } |
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(to: &st_loc, from: buf, n: sizeof(struct st_ram_io))) |
380 | return -EFAULT; |
381 | |
382 | if(copy_from_user(to: &tmpmailbox, from: &buf[sizeof(struct st_ram_io)], |
383 | n: 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 (IndexCard >= MAX_BOARD) |
391 | return -EINVAL; |
392 | IndexCard = array_index_nospec(IndexCard, MAX_BOARD); |
393 | |
394 | if (!apbs[IndexCard].RamIO) |
395 | return -EINVAL; |
396 | |
397 | #ifdef DEBUG |
398 | printk("Write to applicom card #%d. struct st_ram_io follows:" , |
399 | IndexCard+1); |
400 | |
401 | for (c = 0; c < sizeof(struct st_ram_io);) { |
402 | |
403 | printk("\n%5.5X: %2.2X" , c, ((unsigned char *) &st_loc)[c]); |
404 | |
405 | for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) { |
406 | printk(" %2.2X" , ((unsigned char *) &st_loc)[c]); |
407 | } |
408 | } |
409 | |
410 | printk("\nstruct mailbox follows:" ); |
411 | |
412 | for (c = 0; c < sizeof(struct mailbox);) { |
413 | printk("\n%5.5X: %2.2X" , c, ((unsigned char *) &tmpmailbox)[c]); |
414 | |
415 | for (c++; c % 8 && c < sizeof(struct mailbox); c++) { |
416 | printk(" %2.2X" , ((unsigned char *) &tmpmailbox)[c]); |
417 | } |
418 | } |
419 | |
420 | printk("\n" ); |
421 | #endif |
422 | |
423 | spin_lock_irqsave(&apbs[IndexCard].mutex, flags); |
424 | |
425 | /* Test octet ready correct */ |
426 | if(readb(addr: apbs[IndexCard].RamIO + DATA_FROM_PC_READY) > 2) { |
427 | Dummy = readb(addr: apbs[IndexCard].RamIO + VERS); |
428 | spin_unlock_irqrestore(lock: &apbs[IndexCard].mutex, flags); |
429 | printk(KERN_WARNING "APPLICOM driver write error board %d, DataFromPcReady = %d\n" , |
430 | IndexCard,(int)readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY)); |
431 | DeviceErrorCount++; |
432 | return -EIO; |
433 | } |
434 | |
435 | /* Place ourselves on the wait queue */ |
436 | set_current_state(TASK_INTERRUPTIBLE); |
437 | add_wait_queue(wq_head: &apbs[IndexCard].FlagSleepSend, wq_entry: &wait); |
438 | |
439 | /* Check whether the card is ready for us */ |
440 | while (readb(addr: apbs[IndexCard].RamIO + DATA_FROM_PC_READY) != 0) { |
441 | Dummy = readb(addr: apbs[IndexCard].RamIO + VERS); |
442 | /* It's busy. Sleep. */ |
443 | |
444 | spin_unlock_irqrestore(lock: &apbs[IndexCard].mutex, flags); |
445 | schedule(); |
446 | if (signal_pending(current)) { |
447 | remove_wait_queue(wq_head: &apbs[IndexCard].FlagSleepSend, |
448 | wq_entry: &wait); |
449 | return -EINTR; |
450 | } |
451 | spin_lock_irqsave(&apbs[IndexCard].mutex, flags); |
452 | set_current_state(TASK_INTERRUPTIBLE); |
453 | } |
454 | |
455 | /* We may not have actually slept */ |
456 | set_current_state(TASK_RUNNING); |
457 | remove_wait_queue(wq_head: &apbs[IndexCard].FlagSleepSend, wq_entry: &wait); |
458 | |
459 | writeb(val: 1, addr: apbs[IndexCard].RamIO + DATA_FROM_PC_READY); |
460 | |
461 | /* Which is best - lock down the pages with rawio and then |
462 | copy directly, or use bounce buffers? For now we do the latter |
463 | because it works with 2.2 still */ |
464 | { |
465 | unsigned char *from = (unsigned char *) &tmpmailbox; |
466 | void __iomem *to = apbs[IndexCard].RamIO + RAM_FROM_PC; |
467 | int c; |
468 | |
469 | for (c = 0; c < sizeof(struct mailbox); c++) |
470 | writeb(val: *(from++), addr: to++); |
471 | } |
472 | |
473 | writeb(val: 0x20, addr: apbs[IndexCard].RamIO + TIC_OWNER_FROM_PC); |
474 | writeb(val: 0xff, addr: apbs[IndexCard].RamIO + NUMCARD_OWNER_FROM_PC); |
475 | writeb(val: TicCard, addr: apbs[IndexCard].RamIO + TIC_DES_FROM_PC); |
476 | writeb(val: NumCard, addr: apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC); |
477 | writeb(val: 2, addr: apbs[IndexCard].RamIO + DATA_FROM_PC_READY); |
478 | writeb(val: 1, addr: apbs[IndexCard].RamIO + RAM_IT_FROM_PC); |
479 | Dummy = readb(addr: apbs[IndexCard].RamIO + VERS); |
480 | spin_unlock_irqrestore(lock: &apbs[IndexCard].mutex, flags); |
481 | return 0; |
482 | } |
483 | |
484 | static int do_ac_read(int IndexCard, char __user *buf, |
485 | struct st_ram_io *st_loc, struct mailbox *mailbox) |
486 | { |
487 | void __iomem *from = apbs[IndexCard].RamIO + RAM_TO_PC; |
488 | unsigned char *to = (unsigned char *)mailbox; |
489 | #ifdef DEBUG |
490 | int c; |
491 | #endif |
492 | |
493 | st_loc->tic_owner_to_pc = readb(addr: apbs[IndexCard].RamIO + TIC_OWNER_TO_PC); |
494 | st_loc->numcard_owner_to_pc = readb(addr: apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC); |
495 | |
496 | |
497 | { |
498 | int c; |
499 | |
500 | for (c = 0; c < sizeof(struct mailbox); c++) |
501 | *(to++) = readb(addr: from++); |
502 | } |
503 | writeb(val: 1, addr: apbs[IndexCard].RamIO + ACK_FROM_PC_READY); |
504 | writeb(val: 1, addr: apbs[IndexCard].RamIO + TYP_ACK_FROM_PC); |
505 | writeb(val: IndexCard+1, addr: apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC); |
506 | writeb(readb(addr: apbs[IndexCard].RamIO + TIC_OWNER_TO_PC), |
507 | addr: apbs[IndexCard].RamIO + TIC_ACK_FROM_PC); |
508 | writeb(val: 2, addr: apbs[IndexCard].RamIO + ACK_FROM_PC_READY); |
509 | writeb(val: 0, addr: apbs[IndexCard].RamIO + DATA_TO_PC_READY); |
510 | writeb(val: 2, addr: apbs[IndexCard].RamIO + RAM_IT_FROM_PC); |
511 | Dummy = readb(addr: apbs[IndexCard].RamIO + VERS); |
512 | |
513 | #ifdef DEBUG |
514 | printk("Read from applicom card #%d. struct st_ram_io follows:" , NumCard); |
515 | |
516 | for (c = 0; c < sizeof(struct st_ram_io);) { |
517 | printk("\n%5.5X: %2.2X" , c, ((unsigned char *)st_loc)[c]); |
518 | |
519 | for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) { |
520 | printk(" %2.2X" , ((unsigned char *)st_loc)[c]); |
521 | } |
522 | } |
523 | |
524 | printk("\nstruct mailbox follows:" ); |
525 | |
526 | for (c = 0; c < sizeof(struct mailbox);) { |
527 | printk("\n%5.5X: %2.2X" , c, ((unsigned char *)mailbox)[c]); |
528 | |
529 | for (c++; c % 8 && c < sizeof(struct mailbox); c++) { |
530 | printk(" %2.2X" , ((unsigned char *)mailbox)[c]); |
531 | } |
532 | } |
533 | printk("\n" ); |
534 | #endif |
535 | return (sizeof(struct st_ram_io) + sizeof(struct mailbox)); |
536 | } |
537 | |
538 | static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_t *ptr) |
539 | { |
540 | unsigned long flags; |
541 | unsigned int i; |
542 | unsigned char tmp; |
543 | int ret = 0; |
544 | DECLARE_WAITQUEUE(wait, current); |
545 | #ifdef DEBUG |
546 | int loopcount=0; |
547 | #endif |
548 | /* No need to ratelimit this. Only root can trigger it anyway */ |
549 | if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) { |
550 | printk( KERN_WARNING "Hmmm. read() of Applicom card, length %zd != expected %zd\n" , |
551 | count,sizeof(struct st_ram_io) + sizeof(struct mailbox)); |
552 | return -EINVAL; |
553 | } |
554 | |
555 | while(1) { |
556 | /* Stick ourself on the wait queue */ |
557 | set_current_state(TASK_INTERRUPTIBLE); |
558 | add_wait_queue(wq_head: &FlagSleepRec, wq_entry: &wait); |
559 | |
560 | /* Scan each board, looking for one which has a packet for us */ |
561 | for (i=0; i < MAX_BOARD; i++) { |
562 | if (!apbs[i].RamIO) |
563 | continue; |
564 | spin_lock_irqsave(&apbs[i].mutex, flags); |
565 | |
566 | tmp = readb(addr: apbs[i].RamIO + DATA_TO_PC_READY); |
567 | |
568 | if (tmp == 2) { |
569 | struct st_ram_io st_loc; |
570 | struct mailbox mailbox; |
571 | |
572 | /* Got a packet for us */ |
573 | memset(&st_loc, 0, sizeof(st_loc)); |
574 | ret = do_ac_read(IndexCard: i, buf, st_loc: &st_loc, mailbox: &mailbox); |
575 | spin_unlock_irqrestore(lock: &apbs[i].mutex, flags); |
576 | set_current_state(TASK_RUNNING); |
577 | remove_wait_queue(wq_head: &FlagSleepRec, wq_entry: &wait); |
578 | |
579 | if (copy_to_user(to: buf, from: &st_loc, n: sizeof(st_loc))) |
580 | return -EFAULT; |
581 | if (copy_to_user(to: buf + sizeof(st_loc), from: &mailbox, n: sizeof(mailbox))) |
582 | return -EFAULT; |
583 | return tmp; |
584 | } |
585 | |
586 | if (tmp > 2) { |
587 | /* Got an error */ |
588 | Dummy = readb(addr: apbs[i].RamIO + VERS); |
589 | |
590 | spin_unlock_irqrestore(lock: &apbs[i].mutex, flags); |
591 | set_current_state(TASK_RUNNING); |
592 | remove_wait_queue(wq_head: &FlagSleepRec, wq_entry: &wait); |
593 | |
594 | printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n" , |
595 | i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY)); |
596 | DeviceErrorCount++; |
597 | return -EIO; |
598 | } |
599 | |
600 | /* Nothing for us. Try the next board */ |
601 | Dummy = readb(addr: apbs[i].RamIO + VERS); |
602 | spin_unlock_irqrestore(lock: &apbs[i].mutex, flags); |
603 | |
604 | } /* per board */ |
605 | |
606 | /* OK - No boards had data for us. Sleep now */ |
607 | |
608 | schedule(); |
609 | remove_wait_queue(wq_head: &FlagSleepRec, wq_entry: &wait); |
610 | |
611 | if (signal_pending(current)) |
612 | return -EINTR; |
613 | |
614 | #ifdef DEBUG |
615 | if (loopcount++ > 2) { |
616 | printk(KERN_DEBUG "Looping in ac_read. loopcount %d\n" , loopcount); |
617 | } |
618 | #endif |
619 | } |
620 | } |
621 | |
622 | static irqreturn_t ac_interrupt(int vec, void *dev_instance) |
623 | { |
624 | unsigned int i; |
625 | unsigned int FlagInt; |
626 | unsigned int LoopCount; |
627 | int handled = 0; |
628 | |
629 | // printk("Applicom interrupt on IRQ %d occurred\n", vec); |
630 | |
631 | LoopCount = 0; |
632 | |
633 | do { |
634 | FlagInt = 0; |
635 | for (i = 0; i < MAX_BOARD; i++) { |
636 | |
637 | /* Skip if this board doesn't exist */ |
638 | if (!apbs[i].RamIO) |
639 | continue; |
640 | |
641 | spin_lock(lock: &apbs[i].mutex); |
642 | |
643 | /* Skip if this board doesn't want attention */ |
644 | if(readb(addr: apbs[i].RamIO + RAM_IT_TO_PC) == 0) { |
645 | spin_unlock(lock: &apbs[i].mutex); |
646 | continue; |
647 | } |
648 | |
649 | handled = 1; |
650 | FlagInt = 1; |
651 | writeb(val: 0, addr: apbs[i].RamIO + RAM_IT_TO_PC); |
652 | |
653 | if (readb(addr: apbs[i].RamIO + DATA_TO_PC_READY) > 2) { |
654 | printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n" , |
655 | i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY)); |
656 | DeviceErrorCount++; |
657 | } |
658 | |
659 | if((readb(addr: apbs[i].RamIO + DATA_FROM_PC_READY) > 2) && |
660 | (readb(addr: apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) { |
661 | |
662 | printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n" , |
663 | i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY)); |
664 | DeviceErrorCount++; |
665 | } |
666 | |
667 | if (readb(addr: apbs[i].RamIO + DATA_TO_PC_READY) == 2) { /* mailbox sent by the card ? */ |
668 | if (waitqueue_active(wq_head: &FlagSleepRec)) { |
669 | wake_up_interruptible(&FlagSleepRec); |
670 | } |
671 | } |
672 | |
673 | if (readb(addr: apbs[i].RamIO + DATA_FROM_PC_READY) == 0) { /* ram i/o free for write by pc ? */ |
674 | if (waitqueue_active(wq_head: &apbs[i].FlagSleepSend)) { /* process sleep during read ? */ |
675 | wake_up_interruptible(&apbs[i].FlagSleepSend); |
676 | } |
677 | } |
678 | Dummy = readb(addr: apbs[i].RamIO + VERS); |
679 | |
680 | if(readb(addr: apbs[i].RamIO + RAM_IT_TO_PC)) { |
681 | /* There's another int waiting on this card */ |
682 | spin_unlock(lock: &apbs[i].mutex); |
683 | i--; |
684 | } else { |
685 | spin_unlock(lock: &apbs[i].mutex); |
686 | } |
687 | } |
688 | if (FlagInt) |
689 | LoopCount = 0; |
690 | else |
691 | LoopCount++; |
692 | } while(LoopCount < 2); |
693 | return IRQ_RETVAL(handled); |
694 | } |
695 | |
696 | |
697 | |
698 | static long ac_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
699 | |
700 | { /* @ ADG ou ATO selon le cas */ |
701 | int i; |
702 | unsigned char IndexCard; |
703 | void __iomem *pmem; |
704 | int ret = 0; |
705 | static int warncount = 10; |
706 | volatile unsigned char byte_reset_it; |
707 | struct st_ram_io *adgl; |
708 | void __user *argp = (void __user *)arg; |
709 | |
710 | /* In general, the device is only openable by root anyway, so we're not |
711 | particularly concerned that bogus ioctls can flood the console. */ |
712 | |
713 | adgl = memdup_user(argp, sizeof(struct st_ram_io)); |
714 | if (IS_ERR(ptr: adgl)) |
715 | return PTR_ERR(ptr: adgl); |
716 | |
717 | mutex_lock(&ac_mutex); |
718 | IndexCard = adgl->num_card-1; |
719 | |
720 | if (cmd != 6 && IndexCard >= MAX_BOARD) |
721 | goto err; |
722 | IndexCard = array_index_nospec(IndexCard, MAX_BOARD); |
723 | |
724 | if (cmd != 6 && !apbs[IndexCard].RamIO) |
725 | goto err; |
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(addr: pmem++); |
733 | if (copy_to_user(to: argp, from: adgl, n: 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(addr: pmem++); |
740 | for (i = 0; i < 2; i++) |
741 | adgl->error_code[i] = readb(addr: pmem++); |
742 | for (i = 0; i < 4; i++) |
743 | adgl->parameter_error[i] = readb(addr: pmem++); |
744 | pmem = apbs[IndexCard].RamIO + VERS; |
745 | adgl->vers = readb(addr: pmem); |
746 | pmem = apbs[IndexCard].RamIO + TYPE_CARD; |
747 | for (i = 0; i < 20; i++) |
748 | adgl->reserv1[i] = readb(addr: pmem++); |
749 | *(int *)&adgl->reserv1[20] = |
750 | (readb(addr: apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) + |
751 | (readb(addr: apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) + |
752 | (readb(addr: apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) ); |
753 | |
754 | if (copy_to_user(to: argp, from: adgl, n: 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(val: 0xff, addr: pmem++); |
761 | writeb(val: adgl->data_from_pc_ready, |
762 | addr: apbs[IndexCard].RamIO + DATA_FROM_PC_READY); |
763 | |
764 | writeb(val: 1, addr: 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(addr: 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(val: adgl->tic_des_from_pc, addr: pmem); |
775 | break; |
776 | case 4: |
777 | pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC; |
778 | adgl->tic_owner_to_pc = readb(addr: pmem++); |
779 | adgl->numcard_owner_to_pc = readb(addr: pmem); |
780 | if (copy_to_user(to: argp, from: adgl,n: sizeof(struct st_ram_io))) |
781 | ret = -EFAULT; |
782 | break; |
783 | case 5: |
784 | writeb(val: adgl->num_card, addr: apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC); |
785 | writeb(val: adgl->num_card, addr: apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC); |
786 | writeb(val: adgl->num_card, addr: apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC); |
787 | writeb(val: 4, addr: apbs[IndexCard].RamIO + DATA_FROM_PC_READY); |
788 | writeb(val: 1, addr: 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(addr: 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[i].RamIO + VERS) >> 4), |
809 | (int)(readb(apbs[i].RamIO + VERS) & 0xF), |
810 | boardname); |
811 | |
812 | |
813 | serial = (readb(addr: apbs[i].RamIO + SERIAL_NUMBER) << 16) + |
814 | (readb(addr: apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + |
815 | (readb(addr: 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(wq_head: &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(wq_head: &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(addr: apbs[IndexCard].RamIO + VERS); |
840 | kfree(objp: adgl); |
841 | mutex_unlock(lock: &ac_mutex); |
842 | return ret; |
843 | |
844 | err: |
845 | if (warncount) { |
846 | pr_warn("APPLICOM driver IOCTL, bad board number %d\n" , |
847 | (int)IndexCard + 1); |
848 | warncount--; |
849 | } |
850 | kfree(objp: adgl); |
851 | mutex_unlock(lock: &ac_mutex); |
852 | return -EINVAL; |
853 | |
854 | } |
855 | |
856 | |