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09c434b8 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 LT |
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 */ | |
3ad2f3fb | 18 | /* addresses de base des cartes, IOCTL 6 plus complet */ |
1da177e4 LT |
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> | |
174cd4b1 | 27 | #include <linux/sched/signal.h> |
1da177e4 LT |
28 | #include <linux/slab.h> |
29 | #include <linux/errno.h> | |
613655fa | 30 | #include <linux/mutex.h> |
1da177e4 LT |
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> | |
d7ac3c6e | 36 | #include <linux/nospec.h> |
1da177e4 LT |
37 | |
38 | #include <asm/io.h> | |
7c0f6ba6 | 39 | #include <linux/uaccess.h> |
1da177e4 LT |
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 | |
1da177e4 LT |
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 | |
1da177e4 | 63 | |
613655fa | 64 | static DEFINE_MUTEX(ac_mutex); |
1da177e4 LT |
65 | static char *applicom_pci_devnames[] = { |
66 | "PCI board", | |
67 | "PCI2000IBS / PCI2000CAN", | |
68 | "PCI2000PFB" | |
69 | }; | |
70 | ||
2c9c4ae6 | 71 | static const struct pci_device_id applicom_pci_tbl[] = { |
53a7a1bb JS |
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) }, | |
1da177e4 LT |
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"); | |
14f8d3ff | 82 | MODULE_ALIAS_MISCDEV(AC_MINOR); |
1da177e4 | 83 | |
1da177e4 LT |
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 | ||
cab00a3e JW |
92 | static unsigned int irq; /* interrupt number IRQ */ |
93 | static unsigned long mem; /* physical segment of board */ | |
1da177e4 | 94 | |
1c37ab5e | 95 | module_param_hw(irq, uint, irq, 0); |
1da177e4 | 96 | MODULE_PARM_DESC(irq, "IRQ of the Applicom board"); |
1c37ab5e | 97 | module_param_hw(mem, ulong, iomem, 0); |
1da177e4 LT |
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 *); | |
55929332 | 109 | static long ac_ioctl(struct file *, unsigned int, unsigned long); |
7d12e780 | 110 | static irqreturn_t ac_interrupt(int, void *); |
1da177e4 | 111 | |
62322d25 | 112 | static const struct file_operations ac_fops = { |
1da177e4 LT |
113 | .owner = THIS_MODULE, |
114 | .llseek = no_llseek, | |
115 | .read = ac_read, | |
116 | .write = ac_write, | |
55929332 | 117 | .unlocked_ioctl = ac_ioctl, |
1da177e4 LT |
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(loc + CONF_END_TEST) != 0x00) || | |
134 | (readb(loc + CONF_END_TEST + 1) != 0x55) || | |
135 | (readb(loc + CONF_END_TEST + 2) != 0xAA) || | |
136 | (readb(loc + CONF_END_TEST + 3) != 0xFF)) | |
137 | return 0; | |
138 | ||
139 | if (!boardno) | |
140 | boardno = readb(loc + NUMCARD_OWNER_TO_PC); | |
141 | ||
e60b6e2f | 142 | if (!boardno || boardno > MAX_BOARD) { |
1da177e4 LT |
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(loc + RAM_IT_TO_PC); | |
161 | ||
162 | numboards++; | |
163 | return boardno + 1; | |
164 | } | |
165 | ||
2e611390 | 166 | static void __exit applicom_exit(void) |
1da177e4 | 167 | { |
819a3eba | 168 | unsigned int i; |
1da177e4 LT |
169 | |
170 | misc_deregister(&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(apbs[i].RamIO); | |
181 | } | |
182 | } | |
183 | ||
2e611390 | 184 | static int __init applicom_init(void) |
1da177e4 LT |
185 | { |
186 | int i, numisa = 0; | |
187 | struct pci_dev *dev = NULL; | |
188 | void __iomem *RamIO; | |
819a3eba | 189 | int boardno, ret; |
1da177e4 LT |
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, dev))) { | |
196 | ||
53a7a1bb | 197 | if (!pci_match_id(applicom_pci_tbl, dev)) |
1da177e4 LT |
198 | continue; |
199 | ||
200 | if (pci_enable_device(dev)) | |
201 | return -EIO; | |
202 | ||
4bdc0d67 | 203 | RamIO = ioremap(pci_resource_start(dev, 0), LEN_RAM_IO); |
1da177e4 LT |
204 | |
205 | if (!RamIO) { | |
e29419ff GKH |
206 | printk(KERN_INFO "ac.o: Failed to ioremap PCI memory " |
207 | "space at 0x%llx\n", | |
55b29a72 | 208 | (unsigned long long)pci_resource_start(dev, 0)); |
1da177e4 LT |
209 | pci_disable_device(dev); |
210 | return -EIO; | |
211 | } | |
212 | ||
e29419ff GKH |
213 | printk(KERN_INFO "Applicom %s found at mem 0x%llx, irq %d\n", |
214 | applicom_pci_devnames[dev->device-1], | |
55b29a72 | 215 | (unsigned long long)pci_resource_start(dev, 0), |
1da177e4 LT |
216 | dev->irq); |
217 | ||
55b29a72 JS |
218 | boardno = ac_register_board(pci_resource_start(dev, 0), |
219 | RamIO, 0); | |
1da177e4 LT |
220 | if (!boardno) { |
221 | printk(KERN_INFO "ac.o: PCI Applicom device doesn't have correct signature.\n"); | |
222 | iounmap(RamIO); | |
223 | pci_disable_device(dev); | |
224 | continue; | |
225 | } | |
226 | ||
0f2ed4c6 | 227 | if (request_irq(dev->irq, &ac_interrupt, IRQF_SHARED, "Applicom PCI", &dummy)) { |
1da177e4 LT |
228 | printk(KERN_INFO "Could not allocate IRQ %d for PCI Applicom device.\n", dev->irq); |
229 | iounmap(RamIO); | |
230 | pci_disable_device(dev); | |
231 | apbs[boardno - 1].RamIO = NULL; | |
232 | continue; | |
233 | } | |
234 | ||
235 | /* Enable interrupts. */ | |
236 | ||
237 | writeb(0x40, apbs[boardno - 1].RamIO + RAM_IT_FROM_PC); | |
238 | ||
239 | apbs[boardno - 1].irq = dev->irq; | |
240 | } | |
241 | ||
242 | /* Finished with PCI cards. If none registered, | |
243 | * and there was no mem/irq specified, exit */ | |
244 | ||
245 | if (!mem || !irq) { | |
246 | if (numboards) | |
247 | goto fin; | |
248 | else { | |
249 | printk(KERN_INFO "ac.o: No PCI boards found.\n"); | |
250 | printk(KERN_INFO "ac.o: For an ISA board you must supply memory and irq parameters.\n"); | |
251 | return -ENXIO; | |
252 | } | |
253 | } | |
254 | ||
255 | /* Now try the specified ISA cards */ | |
256 | ||
257 | for (i = 0; i < MAX_ISA_BOARD; i++) { | |
4bdc0d67 | 258 | RamIO = ioremap(mem + (LEN_RAM_IO * i), LEN_RAM_IO); |
1da177e4 LT |
259 | |
260 | if (!RamIO) { | |
261 | printk(KERN_INFO "ac.o: Failed to ioremap the ISA card's memory space (slot #%d)\n", i + 1); | |
262 | continue; | |
263 | } | |
264 | ||
265 | if (!(boardno = ac_register_board((unsigned long)mem+ (LEN_RAM_IO*i), | |
266 | RamIO,i+1))) { | |
267 | iounmap(RamIO); | |
268 | continue; | |
269 | } | |
270 | ||
271 | printk(KERN_NOTICE "Applicom ISA card found at mem 0x%lx, irq %d\n", mem + (LEN_RAM_IO*i), irq); | |
272 | ||
273 | if (!numisa) { | |
0f2ed4c6 | 274 | if (request_irq(irq, &ac_interrupt, IRQF_SHARED, "Applicom ISA", &dummy)) { |
1da177e4 LT |
275 | printk(KERN_WARNING "Could not allocate IRQ %d for ISA Applicom device.\n", irq); |
276 | iounmap(RamIO); | |
277 | apbs[boardno - 1].RamIO = NULL; | |
278 | } | |
279 | else | |
280 | apbs[boardno - 1].irq = irq; | |
281 | } | |
282 | else | |
283 | apbs[boardno - 1].irq = 0; | |
284 | ||
285 | numisa++; | |
286 | } | |
287 | ||
288 | if (!numisa) | |
819a3eba CL |
289 | printk(KERN_WARNING "ac.o: No valid ISA Applicom boards found " |
290 | "at mem 0x%lx\n", mem); | |
1da177e4 LT |
291 | |
292 | fin: | |
293 | init_waitqueue_head(&FlagSleepRec); | |
294 | ||
295 | WriteErrorCount = 0; | |
296 | ReadErrorCount = 0; | |
297 | DeviceErrorCount = 0; | |
298 | ||
299 | if (numboards) { | |
819a3eba CL |
300 | ret = misc_register(&ac_miscdev); |
301 | if (ret) { | |
302 | printk(KERN_WARNING "ac.o: Unable to register misc device\n"); | |
303 | goto out; | |
304 | } | |
1da177e4 LT |
305 | for (i = 0; i < MAX_BOARD; i++) { |
306 | int serial; | |
307 | char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1]; | |
308 | ||
309 | if (!apbs[i].RamIO) | |
310 | continue; | |
311 | ||
312 | for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++) | |
313 | boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial); | |
314 | ||
315 | boardname[serial] = 0; | |
316 | ||
317 | ||
318 | printk(KERN_INFO "Applicom board %d: %s, PROM V%d.%d", | |
319 | i+1, boardname, | |
320 | (int)(readb(apbs[i].RamIO + VERS) >> 4), | |
321 | (int)(readb(apbs[i].RamIO + VERS) & 0xF)); | |
322 | ||
323 | serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + | |
324 | (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + | |
325 | (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) ); | |
326 | ||
327 | if (serial != 0) | |
328 | printk(" S/N %d\n", serial); | |
329 | else | |
330 | printk("\n"); | |
331 | } | |
332 | return 0; | |
333 | } | |
334 | ||
335 | else | |
336 | return -ENXIO; | |
819a3eba CL |
337 | |
338 | out: | |
339 | for (i = 0; i < MAX_BOARD; i++) { | |
340 | if (!apbs[i].RamIO) | |
341 | continue; | |
342 | if (apbs[i].irq) | |
343 | free_irq(apbs[i].irq, &dummy); | |
344 | iounmap(apbs[i].RamIO); | |
345 | } | |
819a3eba | 346 | return ret; |
1da177e4 LT |
347 | } |
348 | ||
2e611390 AB |
349 | module_init(applicom_init); |
350 | module_exit(applicom_exit); | |
1da177e4 | 351 | |
1da177e4 LT |
352 | |
353 | static ssize_t ac_write(struct file *file, const char __user *buf, size_t count, loff_t * ppos) | |
354 | { | |
355 | unsigned int NumCard; /* Board number 1 -> 8 */ | |
356 | unsigned int IndexCard; /* Index board number 0 -> 7 */ | |
357 | unsigned char TicCard; /* Board TIC to send */ | |
358 | unsigned long flags; /* Current priority */ | |
359 | struct st_ram_io st_loc; | |
360 | struct mailbox tmpmailbox; | |
361 | #ifdef DEBUG | |
362 | int c; | |
363 | #endif | |
364 | DECLARE_WAITQUEUE(wait, current); | |
365 | ||
366 | if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) { | |
367 | static int warncount = 5; | |
368 | if (warncount) { | |
369 | printk(KERN_INFO "Hmmm. write() of Applicom card, length %zd != expected %zd\n", | |
370 | count, sizeof(struct st_ram_io) + sizeof(struct mailbox)); | |
371 | warncount--; | |
372 | } | |
373 | return -EINVAL; | |
374 | } | |
375 | ||
376 | if(copy_from_user(&st_loc, buf, sizeof(struct st_ram_io))) | |
377 | return -EFAULT; | |
378 | ||
379 | if(copy_from_user(&tmpmailbox, &buf[sizeof(struct st_ram_io)], | |
380 | sizeof(struct mailbox))) | |
381 | return -EFAULT; | |
382 | ||
383 | NumCard = st_loc.num_card; /* board number to send */ | |
384 | TicCard = st_loc.tic_des_from_pc; /* tic number to send */ | |
385 | IndexCard = NumCard - 1; | |
386 | ||
d7ac3c6e GS |
387 | if (IndexCard >= MAX_BOARD) |
388 | return -EINVAL; | |
389 | IndexCard = array_index_nospec(IndexCard, MAX_BOARD); | |
390 | ||
391 | if (!apbs[IndexCard].RamIO) | |
1da177e4 LT |
392 | return -EINVAL; |
393 | ||
394 | #ifdef DEBUG | |
395 | printk("Write to applicom card #%d. struct st_ram_io follows:", | |
396 | IndexCard+1); | |
397 | ||
398 | for (c = 0; c < sizeof(struct st_ram_io);) { | |
399 | ||
400 | printk("\n%5.5X: %2.2X", c, ((unsigned char *) &st_loc)[c]); | |
401 | ||
402 | for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) { | |
403 | printk(" %2.2X", ((unsigned char *) &st_loc)[c]); | |
404 | } | |
405 | } | |
406 | ||
407 | printk("\nstruct mailbox follows:"); | |
408 | ||
409 | for (c = 0; c < sizeof(struct mailbox);) { | |
410 | printk("\n%5.5X: %2.2X", c, ((unsigned char *) &tmpmailbox)[c]); | |
411 | ||
412 | for (c++; c % 8 && c < sizeof(struct mailbox); c++) { | |
413 | printk(" %2.2X", ((unsigned char *) &tmpmailbox)[c]); | |
414 | } | |
415 | } | |
416 | ||
417 | printk("\n"); | |
418 | #endif | |
419 | ||
420 | spin_lock_irqsave(&apbs[IndexCard].mutex, flags); | |
421 | ||
422 | /* Test octet ready correct */ | |
423 | if(readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) > 2) { | |
424 | Dummy = readb(apbs[IndexCard].RamIO + VERS); | |
425 | spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags); | |
426 | printk(KERN_WARNING "APPLICOM driver write error board %d, DataFromPcReady = %d\n", | |
427 | IndexCard,(int)readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY)); | |
428 | DeviceErrorCount++; | |
429 | return -EIO; | |
430 | } | |
431 | ||
432 | /* Place ourselves on the wait queue */ | |
433 | set_current_state(TASK_INTERRUPTIBLE); | |
434 | add_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait); | |
435 | ||
436 | /* Check whether the card is ready for us */ | |
437 | while (readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) != 0) { | |
438 | Dummy = readb(apbs[IndexCard].RamIO + VERS); | |
439 | /* It's busy. Sleep. */ | |
440 | ||
441 | spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags); | |
442 | schedule(); | |
443 | if (signal_pending(current)) { | |
444 | remove_wait_queue(&apbs[IndexCard].FlagSleepSend, | |
445 | &wait); | |
446 | return -EINTR; | |
447 | } | |
448 | spin_lock_irqsave(&apbs[IndexCard].mutex, flags); | |
449 | set_current_state(TASK_INTERRUPTIBLE); | |
450 | } | |
451 | ||
452 | /* We may not have actually slept */ | |
453 | set_current_state(TASK_RUNNING); | |
454 | remove_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait); | |
455 | ||
456 | writeb(1, apbs[IndexCard].RamIO + DATA_FROM_PC_READY); | |
457 | ||
458 | /* Which is best - lock down the pages with rawio and then | |
459 | copy directly, or use bounce buffers? For now we do the latter | |
460 | because it works with 2.2 still */ | |
461 | { | |
462 | unsigned char *from = (unsigned char *) &tmpmailbox; | |
463 | void __iomem *to = apbs[IndexCard].RamIO + RAM_FROM_PC; | |
464 | int c; | |
465 | ||
466 | for (c = 0; c < sizeof(struct mailbox); c++) | |
467 | writeb(*(from++), to++); | |
468 | } | |
469 | ||
470 | writeb(0x20, apbs[IndexCard].RamIO + TIC_OWNER_FROM_PC); | |
471 | writeb(0xff, apbs[IndexCard].RamIO + NUMCARD_OWNER_FROM_PC); | |
472 | writeb(TicCard, apbs[IndexCard].RamIO + TIC_DES_FROM_PC); | |
473 | writeb(NumCard, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC); | |
474 | writeb(2, apbs[IndexCard].RamIO + DATA_FROM_PC_READY); | |
475 | writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); | |
476 | Dummy = readb(apbs[IndexCard].RamIO + VERS); | |
477 | spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags); | |
478 | return 0; | |
479 | } | |
480 | ||
481 | static int do_ac_read(int IndexCard, char __user *buf, | |
482 | struct st_ram_io *st_loc, struct mailbox *mailbox) | |
483 | { | |
484 | void __iomem *from = apbs[IndexCard].RamIO + RAM_TO_PC; | |
bc20589b | 485 | unsigned char *to = (unsigned char *)mailbox; |
1da177e4 LT |
486 | #ifdef DEBUG |
487 | int c; | |
488 | #endif | |
489 | ||
490 | st_loc->tic_owner_to_pc = readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC); | |
491 | st_loc->numcard_owner_to_pc = readb(apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC); | |
492 | ||
493 | ||
494 | { | |
495 | int c; | |
496 | ||
497 | for (c = 0; c < sizeof(struct mailbox); c++) | |
498 | *(to++) = readb(from++); | |
499 | } | |
500 | writeb(1, apbs[IndexCard].RamIO + ACK_FROM_PC_READY); | |
501 | writeb(1, apbs[IndexCard].RamIO + TYP_ACK_FROM_PC); | |
502 | writeb(IndexCard+1, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC); | |
503 | writeb(readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC), | |
504 | apbs[IndexCard].RamIO + TIC_ACK_FROM_PC); | |
505 | writeb(2, apbs[IndexCard].RamIO + ACK_FROM_PC_READY); | |
506 | writeb(0, apbs[IndexCard].RamIO + DATA_TO_PC_READY); | |
507 | writeb(2, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); | |
508 | Dummy = readb(apbs[IndexCard].RamIO + VERS); | |
509 | ||
510 | #ifdef DEBUG | |
511 | printk("Read from applicom card #%d. struct st_ram_io follows:", NumCard); | |
512 | ||
513 | for (c = 0; c < sizeof(struct st_ram_io);) { | |
514 | printk("\n%5.5X: %2.2X", c, ((unsigned char *)st_loc)[c]); | |
515 | ||
516 | for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) { | |
517 | printk(" %2.2X", ((unsigned char *)st_loc)[c]); | |
518 | } | |
519 | } | |
520 | ||
521 | printk("\nstruct mailbox follows:"); | |
522 | ||
523 | for (c = 0; c < sizeof(struct mailbox);) { | |
524 | printk("\n%5.5X: %2.2X", c, ((unsigned char *)mailbox)[c]); | |
525 | ||
526 | for (c++; c % 8 && c < sizeof(struct mailbox); c++) { | |
527 | printk(" %2.2X", ((unsigned char *)mailbox)[c]); | |
528 | } | |
529 | } | |
530 | printk("\n"); | |
531 | #endif | |
532 | return (sizeof(struct st_ram_io) + sizeof(struct mailbox)); | |
533 | } | |
534 | ||
535 | static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_t *ptr) | |
536 | { | |
537 | unsigned long flags; | |
538 | unsigned int i; | |
539 | unsigned char tmp; | |
540 | int ret = 0; | |
541 | DECLARE_WAITQUEUE(wait, current); | |
542 | #ifdef DEBUG | |
543 | int loopcount=0; | |
544 | #endif | |
545 | /* No need to ratelimit this. Only root can trigger it anyway */ | |
546 | if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) { | |
547 | printk( KERN_WARNING "Hmmm. read() of Applicom card, length %zd != expected %zd\n", | |
548 | count,sizeof(struct st_ram_io) + sizeof(struct mailbox)); | |
549 | return -EINVAL; | |
550 | } | |
551 | ||
552 | while(1) { | |
553 | /* Stick ourself on the wait queue */ | |
554 | set_current_state(TASK_INTERRUPTIBLE); | |
555 | add_wait_queue(&FlagSleepRec, &wait); | |
556 | ||
557 | /* Scan each board, looking for one which has a packet for us */ | |
558 | for (i=0; i < MAX_BOARD; i++) { | |
559 | if (!apbs[i].RamIO) | |
560 | continue; | |
561 | spin_lock_irqsave(&apbs[i].mutex, flags); | |
562 | ||
563 | tmp = readb(apbs[i].RamIO + DATA_TO_PC_READY); | |
564 | ||
565 | if (tmp == 2) { | |
566 | struct st_ram_io st_loc; | |
567 | struct mailbox mailbox; | |
568 | ||
569 | /* Got a packet for us */ | |
19714a8a | 570 | memset(&st_loc, 0, sizeof(st_loc)); |
1da177e4 LT |
571 | ret = do_ac_read(i, buf, &st_loc, &mailbox); |
572 | spin_unlock_irqrestore(&apbs[i].mutex, flags); | |
573 | set_current_state(TASK_RUNNING); | |
574 | remove_wait_queue(&FlagSleepRec, &wait); | |
575 | ||
576 | if (copy_to_user(buf, &st_loc, sizeof(st_loc))) | |
577 | return -EFAULT; | |
578 | if (copy_to_user(buf + sizeof(st_loc), &mailbox, sizeof(mailbox))) | |
579 | return -EFAULT; | |
580 | return tmp; | |
581 | } | |
582 | ||
583 | if (tmp > 2) { | |
584 | /* Got an error */ | |
585 | Dummy = readb(apbs[i].RamIO + VERS); | |
586 | ||
587 | spin_unlock_irqrestore(&apbs[i].mutex, flags); | |
588 | set_current_state(TASK_RUNNING); | |
589 | remove_wait_queue(&FlagSleepRec, &wait); | |
590 | ||
591 | printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n", | |
592 | i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY)); | |
593 | DeviceErrorCount++; | |
594 | return -EIO; | |
595 | } | |
596 | ||
597 | /* Nothing for us. Try the next board */ | |
598 | Dummy = readb(apbs[i].RamIO + VERS); | |
599 | spin_unlock_irqrestore(&apbs[i].mutex, flags); | |
600 | ||
601 | } /* per board */ | |
602 | ||
603 | /* OK - No boards had data for us. Sleep now */ | |
604 | ||
605 | schedule(); | |
606 | remove_wait_queue(&FlagSleepRec, &wait); | |
607 | ||
608 | if (signal_pending(current)) | |
609 | return -EINTR; | |
610 | ||
611 | #ifdef DEBUG | |
612 | if (loopcount++ > 2) { | |
56003191 | 613 | printk(KERN_DEBUG "Looping in ac_read. loopcount %d\n", loopcount); |
1da177e4 LT |
614 | } |
615 | #endif | |
616 | } | |
617 | } | |
618 | ||
7d12e780 | 619 | static irqreturn_t ac_interrupt(int vec, void *dev_instance) |
1da177e4 LT |
620 | { |
621 | unsigned int i; | |
622 | unsigned int FlagInt; | |
623 | unsigned int LoopCount; | |
624 | int handled = 0; | |
625 | ||
626 | // printk("Applicom interrupt on IRQ %d occurred\n", vec); | |
627 | ||
628 | LoopCount = 0; | |
629 | ||
630 | do { | |
631 | FlagInt = 0; | |
632 | for (i = 0; i < MAX_BOARD; i++) { | |
633 | ||
634 | /* Skip if this board doesn't exist */ | |
635 | if (!apbs[i].RamIO) | |
636 | continue; | |
637 | ||
638 | spin_lock(&apbs[i].mutex); | |
639 | ||
640 | /* Skip if this board doesn't want attention */ | |
641 | if(readb(apbs[i].RamIO + RAM_IT_TO_PC) == 0) { | |
642 | spin_unlock(&apbs[i].mutex); | |
643 | continue; | |
644 | } | |
645 | ||
646 | handled = 1; | |
647 | FlagInt = 1; | |
648 | writeb(0, apbs[i].RamIO + RAM_IT_TO_PC); | |
649 | ||
650 | if (readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2) { | |
651 | printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n", | |
652 | i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY)); | |
653 | DeviceErrorCount++; | |
654 | } | |
655 | ||
656 | if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) && | |
657 | (readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) { | |
658 | ||
659 | printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n", | |
660 | i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY)); | |
661 | DeviceErrorCount++; | |
662 | } | |
663 | ||
664 | if (readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2) { /* mailbox sent by the card ? */ | |
665 | if (waitqueue_active(&FlagSleepRec)) { | |
666 | wake_up_interruptible(&FlagSleepRec); | |
667 | } | |
668 | } | |
669 | ||
670 | if (readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0) { /* ram i/o free for write by pc ? */ | |
671 | if (waitqueue_active(&apbs[i].FlagSleepSend)) { /* process sleep during read ? */ | |
672 | wake_up_interruptible(&apbs[i].FlagSleepSend); | |
673 | } | |
674 | } | |
675 | Dummy = readb(apbs[i].RamIO + VERS); | |
676 | ||
677 | if(readb(apbs[i].RamIO + RAM_IT_TO_PC)) { | |
678 | /* There's another int waiting on this card */ | |
679 | spin_unlock(&apbs[i].mutex); | |
680 | i--; | |
681 | } else { | |
682 | spin_unlock(&apbs[i].mutex); | |
683 | } | |
684 | } | |
685 | if (FlagInt) | |
686 | LoopCount = 0; | |
687 | else | |
688 | LoopCount++; | |
689 | } while(LoopCount < 2); | |
690 | return IRQ_RETVAL(handled); | |
691 | } | |
692 | ||
693 | ||
694 | ||
55929332 | 695 | static long ac_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
1da177e4 LT |
696 | |
697 | { /* @ ADG ou ATO selon le cas */ | |
698 | int i; | |
699 | unsigned char IndexCard; | |
700 | void __iomem *pmem; | |
701 | int ret = 0; | |
d7ac3c6e | 702 | static int warncount = 10; |
1da177e4 LT |
703 | volatile unsigned char byte_reset_it; |
704 | struct st_ram_io *adgl; | |
705 | void __user *argp = (void __user *)arg; | |
706 | ||
707 | /* In general, the device is only openable by root anyway, so we're not | |
708 | particularly concerned that bogus ioctls can flood the console. */ | |
709 | ||
f67231f8 JL |
710 | adgl = memdup_user(argp, sizeof(struct st_ram_io)); |
711 | if (IS_ERR(adgl)) | |
712 | return PTR_ERR(adgl); | |
55929332 | 713 | |
613655fa | 714 | mutex_lock(&ac_mutex); |
1da177e4 LT |
715 | IndexCard = adgl->num_card-1; |
716 | ||
d7ac3c6e GS |
717 | if (cmd != 6 && IndexCard >= MAX_BOARD) |
718 | goto err; | |
719 | IndexCard = array_index_nospec(IndexCard, MAX_BOARD); | |
720 | ||
721 | if (cmd != 6 && !apbs[IndexCard].RamIO) | |
722 | goto err; | |
1da177e4 LT |
723 | |
724 | switch (cmd) { | |
725 | ||
726 | case 0: | |
727 | pmem = apbs[IndexCard].RamIO; | |
728 | for (i = 0; i < sizeof(struct st_ram_io); i++) | |
729 | ((unsigned char *)adgl)[i]=readb(pmem++); | |
730 | if (copy_to_user(argp, adgl, sizeof(struct st_ram_io))) | |
731 | ret = -EFAULT; | |
732 | break; | |
733 | case 1: | |
734 | pmem = apbs[IndexCard].RamIO + CONF_END_TEST; | |
735 | for (i = 0; i < 4; i++) | |
736 | adgl->conf_end_test[i] = readb(pmem++); | |
737 | for (i = 0; i < 2; i++) | |
738 | adgl->error_code[i] = readb(pmem++); | |
739 | for (i = 0; i < 4; i++) | |
740 | adgl->parameter_error[i] = readb(pmem++); | |
741 | pmem = apbs[IndexCard].RamIO + VERS; | |
742 | adgl->vers = readb(pmem); | |
743 | pmem = apbs[IndexCard].RamIO + TYPE_CARD; | |
744 | for (i = 0; i < 20; i++) | |
745 | adgl->reserv1[i] = readb(pmem++); | |
746 | *(int *)&adgl->reserv1[20] = | |
747 | (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) + | |
748 | (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) + | |
749 | (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) ); | |
750 | ||
751 | if (copy_to_user(argp, adgl, sizeof(struct st_ram_io))) | |
752 | ret = -EFAULT; | |
753 | break; | |
754 | case 2: | |
755 | pmem = apbs[IndexCard].RamIO + CONF_END_TEST; | |
756 | for (i = 0; i < 10; i++) | |
757 | writeb(0xff, pmem++); | |
758 | writeb(adgl->data_from_pc_ready, | |
759 | apbs[IndexCard].RamIO + DATA_FROM_PC_READY); | |
760 | ||
761 | writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); | |
762 | ||
763 | for (i = 0; i < MAX_BOARD; i++) { | |
764 | if (apbs[i].RamIO) { | |
765 | byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC); | |
766 | } | |
767 | } | |
768 | break; | |
769 | case 3: | |
770 | pmem = apbs[IndexCard].RamIO + TIC_DES_FROM_PC; | |
771 | writeb(adgl->tic_des_from_pc, pmem); | |
772 | break; | |
773 | case 4: | |
774 | pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC; | |
775 | adgl->tic_owner_to_pc = readb(pmem++); | |
776 | adgl->numcard_owner_to_pc = readb(pmem); | |
777 | if (copy_to_user(argp, adgl,sizeof(struct st_ram_io))) | |
778 | ret = -EFAULT; | |
779 | break; | |
780 | case 5: | |
781 | writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC); | |
782 | writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC); | |
783 | writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC); | |
784 | writeb(4, apbs[IndexCard].RamIO + DATA_FROM_PC_READY); | |
785 | writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); | |
786 | break; | |
787 | case 6: | |
788 | printk(KERN_INFO "APPLICOM driver release .... V2.8.0 ($Revision: 1.30 $)\n"); | |
789 | printk(KERN_INFO "Number of installed boards . %d\n", (int) numboards); | |
790 | printk(KERN_INFO "Segment of board ........... %X\n", (int) mem); | |
791 | printk(KERN_INFO "Interrupt IRQ number ....... %d\n", (int) irq); | |
792 | for (i = 0; i < MAX_BOARD; i++) { | |
793 | int serial; | |
794 | char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1]; | |
795 | ||
796 | if (!apbs[i].RamIO) | |
797 | continue; | |
798 | ||
799 | for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++) | |
800 | boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial); | |
801 | boardname[serial] = 0; | |
802 | ||
803 | printk(KERN_INFO "Prom version board %d ....... V%d.%d %s", | |
804 | i+1, | |
2154e0a4 DC |
805 | (int)(readb(apbs[i].RamIO + VERS) >> 4), |
806 | (int)(readb(apbs[i].RamIO + VERS) & 0xF), | |
1da177e4 LT |
807 | boardname); |
808 | ||
809 | ||
810 | serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + | |
811 | (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + | |
812 | (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) ); | |
813 | ||
814 | if (serial != 0) | |
815 | printk(" S/N %d\n", serial); | |
816 | else | |
817 | printk("\n"); | |
818 | } | |
819 | if (DeviceErrorCount != 0) | |
820 | printk(KERN_INFO "DeviceErrorCount ........... %d\n", DeviceErrorCount); | |
821 | if (ReadErrorCount != 0) | |
822 | printk(KERN_INFO "ReadErrorCount ............. %d\n", ReadErrorCount); | |
823 | if (WriteErrorCount != 0) | |
824 | printk(KERN_INFO "WriteErrorCount ............ %d\n", WriteErrorCount); | |
825 | if (waitqueue_active(&FlagSleepRec)) | |
826 | printk(KERN_INFO "Process in read pending\n"); | |
827 | for (i = 0; i < MAX_BOARD; i++) { | |
828 | if (apbs[i].RamIO && waitqueue_active(&apbs[i].FlagSleepSend)) | |
829 | printk(KERN_INFO "Process in write pending board %d\n",i+1); | |
830 | } | |
831 | break; | |
832 | default: | |
a7be18d4 | 833 | ret = -ENOTTY; |
1da177e4 LT |
834 | break; |
835 | } | |
836 | Dummy = readb(apbs[IndexCard].RamIO + VERS); | |
837 | kfree(adgl); | |
613655fa | 838 | mutex_unlock(&ac_mutex); |
6880149e | 839 | return ret; |
d7ac3c6e GS |
840 | |
841 | err: | |
842 | if (warncount) { | |
843 | pr_warn("APPLICOM driver IOCTL, bad board number %d\n", | |
844 | (int)IndexCard + 1); | |
845 | warncount--; | |
846 | } | |
847 | kfree(adgl); | |
848 | mutex_unlock(&ac_mutex); | |
849 | return -EINVAL; | |
850 | ||
1da177e4 LT |
851 | } |
852 |