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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 | |
56 | #define AC_MINOR 157 | |
57 | ||
58 | #ifndef PCI_VENDOR_ID_APPLICOM | |
59 | #define PCI_VENDOR_ID_APPLICOM 0x1389 | |
60 | #define PCI_DEVICE_ID_APPLICOM_PCIGENERIC 0x0001 | |
61 | #define PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN 0x0002 | |
62 | #define PCI_DEVICE_ID_APPLICOM_PCI2000PFB 0x0003 | |
63 | #endif | |
1da177e4 | 64 | |
613655fa | 65 | static DEFINE_MUTEX(ac_mutex); |
1da177e4 LT |
66 | static char *applicom_pci_devnames[] = { |
67 | "PCI board", | |
68 | "PCI2000IBS / PCI2000CAN", | |
69 | "PCI2000PFB" | |
70 | }; | |
71 | ||
2c9c4ae6 | 72 | static const struct pci_device_id applicom_pci_tbl[] = { |
53a7a1bb JS |
73 | { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCIGENERIC) }, |
74 | { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN) }, | |
75 | { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000PFB) }, | |
1da177e4 LT |
76 | { 0 } |
77 | }; | |
78 | MODULE_DEVICE_TABLE(pci, applicom_pci_tbl); | |
79 | ||
80 | MODULE_AUTHOR("David Woodhouse & Applicom International"); | |
81 | MODULE_DESCRIPTION("Driver for Applicom Profibus card"); | |
82 | MODULE_LICENSE("GPL"); | |
14f8d3ff | 83 | MODULE_ALIAS_MISCDEV(AC_MINOR); |
1da177e4 LT |
84 | |
85 | MODULE_SUPPORTED_DEVICE("ac"); | |
86 | ||
87 | ||
88 | static struct applicom_board { | |
89 | unsigned long PhysIO; | |
90 | void __iomem *RamIO; | |
91 | wait_queue_head_t FlagSleepSend; | |
92 | long irq; | |
93 | spinlock_t mutex; | |
94 | } apbs[MAX_BOARD]; | |
95 | ||
96 | static unsigned int irq = 0; /* interrupt number IRQ */ | |
97 | static unsigned long mem = 0; /* physical segment of board */ | |
98 | ||
1c37ab5e | 99 | module_param_hw(irq, uint, irq, 0); |
1da177e4 | 100 | MODULE_PARM_DESC(irq, "IRQ of the Applicom board"); |
1c37ab5e | 101 | module_param_hw(mem, ulong, iomem, 0); |
1da177e4 LT |
102 | MODULE_PARM_DESC(mem, "Shared Memory Address of Applicom board"); |
103 | ||
104 | static unsigned int numboards; /* number of installed boards */ | |
105 | static volatile unsigned char Dummy; | |
106 | static DECLARE_WAIT_QUEUE_HEAD(FlagSleepRec); | |
107 | static unsigned int WriteErrorCount; /* number of write error */ | |
108 | static unsigned int ReadErrorCount; /* number of read error */ | |
109 | static unsigned int DeviceErrorCount; /* number of device error */ | |
110 | ||
111 | static ssize_t ac_read (struct file *, char __user *, size_t, loff_t *); | |
112 | static ssize_t ac_write (struct file *, const char __user *, size_t, loff_t *); | |
55929332 | 113 | static long ac_ioctl(struct file *, unsigned int, unsigned long); |
7d12e780 | 114 | static irqreturn_t ac_interrupt(int, void *); |
1da177e4 | 115 | |
62322d25 | 116 | static const struct file_operations ac_fops = { |
1da177e4 LT |
117 | .owner = THIS_MODULE, |
118 | .llseek = no_llseek, | |
119 | .read = ac_read, | |
120 | .write = ac_write, | |
55929332 | 121 | .unlocked_ioctl = ac_ioctl, |
1da177e4 LT |
122 | }; |
123 | ||
124 | static struct miscdevice ac_miscdev = { | |
125 | AC_MINOR, | |
126 | "ac", | |
127 | &ac_fops | |
128 | }; | |
129 | ||
130 | static int dummy; /* dev_id for request_irq() */ | |
131 | ||
132 | static int ac_register_board(unsigned long physloc, void __iomem *loc, | |
133 | unsigned char boardno) | |
134 | { | |
135 | volatile unsigned char byte_reset_it; | |
136 | ||
137 | if((readb(loc + CONF_END_TEST) != 0x00) || | |
138 | (readb(loc + CONF_END_TEST + 1) != 0x55) || | |
139 | (readb(loc + CONF_END_TEST + 2) != 0xAA) || | |
140 | (readb(loc + CONF_END_TEST + 3) != 0xFF)) | |
141 | return 0; | |
142 | ||
143 | if (!boardno) | |
144 | boardno = readb(loc + NUMCARD_OWNER_TO_PC); | |
145 | ||
e60b6e2f | 146 | if (!boardno || boardno > MAX_BOARD) { |
1da177e4 LT |
147 | printk(KERN_WARNING "Board #%d (at 0x%lx) is out of range (1 <= x <= %d).\n", |
148 | boardno, physloc, MAX_BOARD); | |
149 | return 0; | |
150 | } | |
151 | ||
152 | if (apbs[boardno - 1].RamIO) { | |
153 | printk(KERN_WARNING "Board #%d (at 0x%lx) conflicts with previous board #%d (at 0x%lx)\n", | |
154 | boardno, physloc, boardno, apbs[boardno-1].PhysIO); | |
155 | return 0; | |
156 | } | |
157 | ||
158 | boardno--; | |
159 | ||
160 | apbs[boardno].PhysIO = physloc; | |
161 | apbs[boardno].RamIO = loc; | |
162 | init_waitqueue_head(&apbs[boardno].FlagSleepSend); | |
163 | spin_lock_init(&apbs[boardno].mutex); | |
164 | byte_reset_it = readb(loc + RAM_IT_TO_PC); | |
165 | ||
166 | numboards++; | |
167 | return boardno + 1; | |
168 | } | |
169 | ||
2e611390 | 170 | static void __exit applicom_exit(void) |
1da177e4 | 171 | { |
819a3eba | 172 | unsigned int i; |
1da177e4 LT |
173 | |
174 | misc_deregister(&ac_miscdev); | |
175 | ||
176 | for (i = 0; i < MAX_BOARD; i++) { | |
177 | ||
178 | if (!apbs[i].RamIO) | |
179 | continue; | |
180 | ||
181 | if (apbs[i].irq) | |
182 | free_irq(apbs[i].irq, &dummy); | |
183 | ||
184 | iounmap(apbs[i].RamIO); | |
185 | } | |
186 | } | |
187 | ||
2e611390 | 188 | static int __init applicom_init(void) |
1da177e4 LT |
189 | { |
190 | int i, numisa = 0; | |
191 | struct pci_dev *dev = NULL; | |
192 | void __iomem *RamIO; | |
819a3eba | 193 | int boardno, ret; |
1da177e4 LT |
194 | |
195 | printk(KERN_INFO "Applicom driver: $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $\n"); | |
196 | ||
197 | /* No mem and irq given - check for a PCI card */ | |
198 | ||
199 | while ( (dev = pci_get_class(PCI_CLASS_OTHERS << 16, dev))) { | |
200 | ||
53a7a1bb | 201 | if (!pci_match_id(applicom_pci_tbl, dev)) |
1da177e4 LT |
202 | continue; |
203 | ||
204 | if (pci_enable_device(dev)) | |
205 | return -EIO; | |
206 | ||
24cb2335 | 207 | RamIO = ioremap_nocache(pci_resource_start(dev, 0), LEN_RAM_IO); |
1da177e4 LT |
208 | |
209 | if (!RamIO) { | |
e29419ff GKH |
210 | printk(KERN_INFO "ac.o: Failed to ioremap PCI memory " |
211 | "space at 0x%llx\n", | |
55b29a72 | 212 | (unsigned long long)pci_resource_start(dev, 0)); |
1da177e4 LT |
213 | pci_disable_device(dev); |
214 | return -EIO; | |
215 | } | |
216 | ||
e29419ff GKH |
217 | printk(KERN_INFO "Applicom %s found at mem 0x%llx, irq %d\n", |
218 | applicom_pci_devnames[dev->device-1], | |
55b29a72 | 219 | (unsigned long long)pci_resource_start(dev, 0), |
1da177e4 LT |
220 | dev->irq); |
221 | ||
55b29a72 JS |
222 | boardno = ac_register_board(pci_resource_start(dev, 0), |
223 | RamIO, 0); | |
1da177e4 LT |
224 | if (!boardno) { |
225 | printk(KERN_INFO "ac.o: PCI Applicom device doesn't have correct signature.\n"); | |
226 | iounmap(RamIO); | |
227 | pci_disable_device(dev); | |
228 | continue; | |
229 | } | |
230 | ||
0f2ed4c6 | 231 | if (request_irq(dev->irq, &ac_interrupt, IRQF_SHARED, "Applicom PCI", &dummy)) { |
1da177e4 LT |
232 | printk(KERN_INFO "Could not allocate IRQ %d for PCI Applicom device.\n", dev->irq); |
233 | iounmap(RamIO); | |
234 | pci_disable_device(dev); | |
235 | apbs[boardno - 1].RamIO = NULL; | |
236 | continue; | |
237 | } | |
238 | ||
239 | /* Enable interrupts. */ | |
240 | ||
241 | writeb(0x40, apbs[boardno - 1].RamIO + RAM_IT_FROM_PC); | |
242 | ||
243 | apbs[boardno - 1].irq = dev->irq; | |
244 | } | |
245 | ||
246 | /* Finished with PCI cards. If none registered, | |
247 | * and there was no mem/irq specified, exit */ | |
248 | ||
249 | if (!mem || !irq) { | |
250 | if (numboards) | |
251 | goto fin; | |
252 | else { | |
253 | printk(KERN_INFO "ac.o: No PCI boards found.\n"); | |
254 | printk(KERN_INFO "ac.o: For an ISA board you must supply memory and irq parameters.\n"); | |
255 | return -ENXIO; | |
256 | } | |
257 | } | |
258 | ||
259 | /* Now try the specified ISA cards */ | |
260 | ||
261 | for (i = 0; i < MAX_ISA_BOARD; i++) { | |
24cb2335 | 262 | RamIO = ioremap_nocache(mem + (LEN_RAM_IO * i), LEN_RAM_IO); |
1da177e4 LT |
263 | |
264 | if (!RamIO) { | |
265 | printk(KERN_INFO "ac.o: Failed to ioremap the ISA card's memory space (slot #%d)\n", i + 1); | |
266 | continue; | |
267 | } | |
268 | ||
269 | if (!(boardno = ac_register_board((unsigned long)mem+ (LEN_RAM_IO*i), | |
270 | RamIO,i+1))) { | |
271 | iounmap(RamIO); | |
272 | continue; | |
273 | } | |
274 | ||
275 | printk(KERN_NOTICE "Applicom ISA card found at mem 0x%lx, irq %d\n", mem + (LEN_RAM_IO*i), irq); | |
276 | ||
277 | if (!numisa) { | |
0f2ed4c6 | 278 | if (request_irq(irq, &ac_interrupt, IRQF_SHARED, "Applicom ISA", &dummy)) { |
1da177e4 LT |
279 | printk(KERN_WARNING "Could not allocate IRQ %d for ISA Applicom device.\n", irq); |
280 | iounmap(RamIO); | |
281 | apbs[boardno - 1].RamIO = NULL; | |
282 | } | |
283 | else | |
284 | apbs[boardno - 1].irq = irq; | |
285 | } | |
286 | else | |
287 | apbs[boardno - 1].irq = 0; | |
288 | ||
289 | numisa++; | |
290 | } | |
291 | ||
292 | if (!numisa) | |
819a3eba CL |
293 | printk(KERN_WARNING "ac.o: No valid ISA Applicom boards found " |
294 | "at mem 0x%lx\n", mem); | |
1da177e4 LT |
295 | |
296 | fin: | |
297 | init_waitqueue_head(&FlagSleepRec); | |
298 | ||
299 | WriteErrorCount = 0; | |
300 | ReadErrorCount = 0; | |
301 | DeviceErrorCount = 0; | |
302 | ||
303 | if (numboards) { | |
819a3eba CL |
304 | ret = misc_register(&ac_miscdev); |
305 | if (ret) { | |
306 | printk(KERN_WARNING "ac.o: Unable to register misc device\n"); | |
307 | goto out; | |
308 | } | |
1da177e4 LT |
309 | for (i = 0; i < MAX_BOARD; i++) { |
310 | int serial; | |
311 | char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1]; | |
312 | ||
313 | if (!apbs[i].RamIO) | |
314 | continue; | |
315 | ||
316 | for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++) | |
317 | boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial); | |
318 | ||
319 | boardname[serial] = 0; | |
320 | ||
321 | ||
322 | printk(KERN_INFO "Applicom board %d: %s, PROM V%d.%d", | |
323 | i+1, boardname, | |
324 | (int)(readb(apbs[i].RamIO + VERS) >> 4), | |
325 | (int)(readb(apbs[i].RamIO + VERS) & 0xF)); | |
326 | ||
327 | serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + | |
328 | (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + | |
329 | (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) ); | |
330 | ||
331 | if (serial != 0) | |
332 | printk(" S/N %d\n", serial); | |
333 | else | |
334 | printk("\n"); | |
335 | } | |
336 | return 0; | |
337 | } | |
338 | ||
339 | else | |
340 | return -ENXIO; | |
819a3eba CL |
341 | |
342 | out: | |
343 | for (i = 0; i < MAX_BOARD; i++) { | |
344 | if (!apbs[i].RamIO) | |
345 | continue; | |
346 | if (apbs[i].irq) | |
347 | free_irq(apbs[i].irq, &dummy); | |
348 | iounmap(apbs[i].RamIO); | |
349 | } | |
819a3eba | 350 | return ret; |
1da177e4 LT |
351 | } |
352 | ||
2e611390 AB |
353 | module_init(applicom_init); |
354 | module_exit(applicom_exit); | |
1da177e4 | 355 | |
1da177e4 LT |
356 | |
357 | static ssize_t ac_write(struct file *file, const char __user *buf, size_t count, loff_t * ppos) | |
358 | { | |
359 | unsigned int NumCard; /* Board number 1 -> 8 */ | |
360 | unsigned int IndexCard; /* Index board number 0 -> 7 */ | |
361 | unsigned char TicCard; /* Board TIC to send */ | |
362 | unsigned long flags; /* Current priority */ | |
363 | struct st_ram_io st_loc; | |
364 | struct mailbox tmpmailbox; | |
365 | #ifdef DEBUG | |
366 | int c; | |
367 | #endif | |
368 | DECLARE_WAITQUEUE(wait, current); | |
369 | ||
370 | if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) { | |
371 | static int warncount = 5; | |
372 | if (warncount) { | |
373 | printk(KERN_INFO "Hmmm. write() of Applicom card, length %zd != expected %zd\n", | |
374 | count, sizeof(struct st_ram_io) + sizeof(struct mailbox)); | |
375 | warncount--; | |
376 | } | |
377 | return -EINVAL; | |
378 | } | |
379 | ||
380 | if(copy_from_user(&st_loc, buf, sizeof(struct st_ram_io))) | |
381 | return -EFAULT; | |
382 | ||
383 | if(copy_from_user(&tmpmailbox, &buf[sizeof(struct st_ram_io)], | |
384 | sizeof(struct mailbox))) | |
385 | return -EFAULT; | |
386 | ||
387 | NumCard = st_loc.num_card; /* board number to send */ | |
388 | TicCard = st_loc.tic_des_from_pc; /* tic number to send */ | |
389 | IndexCard = NumCard - 1; | |
390 | ||
d7ac3c6e GS |
391 | if (IndexCard >= MAX_BOARD) |
392 | return -EINVAL; | |
393 | IndexCard = array_index_nospec(IndexCard, MAX_BOARD); | |
394 | ||
395 | if (!apbs[IndexCard].RamIO) | |
1da177e4 LT |
396 | return -EINVAL; |
397 | ||
398 | #ifdef DEBUG | |
399 | printk("Write to applicom card #%d. struct st_ram_io follows:", | |
400 | IndexCard+1); | |
401 | ||
402 | for (c = 0; c < sizeof(struct st_ram_io);) { | |
403 | ||
404 | printk("\n%5.5X: %2.2X", c, ((unsigned char *) &st_loc)[c]); | |
405 | ||
406 | for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) { | |
407 | printk(" %2.2X", ((unsigned char *) &st_loc)[c]); | |
408 | } | |
409 | } | |
410 | ||
411 | printk("\nstruct mailbox follows:"); | |
412 | ||
413 | for (c = 0; c < sizeof(struct mailbox);) { | |
414 | printk("\n%5.5X: %2.2X", c, ((unsigned char *) &tmpmailbox)[c]); | |
415 | ||
416 | for (c++; c % 8 && c < sizeof(struct mailbox); c++) { | |
417 | printk(" %2.2X", ((unsigned char *) &tmpmailbox)[c]); | |
418 | } | |
419 | } | |
420 | ||
421 | printk("\n"); | |
422 | #endif | |
423 | ||
424 | spin_lock_irqsave(&apbs[IndexCard].mutex, flags); | |
425 | ||
426 | /* Test octet ready correct */ | |
427 | if(readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) > 2) { | |
428 | Dummy = readb(apbs[IndexCard].RamIO + VERS); | |
429 | spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags); | |
430 | printk(KERN_WARNING "APPLICOM driver write error board %d, DataFromPcReady = %d\n", | |
431 | IndexCard,(int)readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY)); | |
432 | DeviceErrorCount++; | |
433 | return -EIO; | |
434 | } | |
435 | ||
436 | /* Place ourselves on the wait queue */ | |
437 | set_current_state(TASK_INTERRUPTIBLE); | |
438 | add_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait); | |
439 | ||
440 | /* Check whether the card is ready for us */ | |
441 | while (readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) != 0) { | |
442 | Dummy = readb(apbs[IndexCard].RamIO + VERS); | |
443 | /* It's busy. Sleep. */ | |
444 | ||
445 | spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags); | |
446 | schedule(); | |
447 | if (signal_pending(current)) { | |
448 | remove_wait_queue(&apbs[IndexCard].FlagSleepSend, | |
449 | &wait); | |
450 | return -EINTR; | |
451 | } | |
452 | spin_lock_irqsave(&apbs[IndexCard].mutex, flags); | |
453 | set_current_state(TASK_INTERRUPTIBLE); | |
454 | } | |
455 | ||
456 | /* We may not have actually slept */ | |
457 | set_current_state(TASK_RUNNING); | |
458 | remove_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait); | |
459 | ||
460 | writeb(1, apbs[IndexCard].RamIO + DATA_FROM_PC_READY); | |
461 | ||
462 | /* Which is best - lock down the pages with rawio and then | |
463 | copy directly, or use bounce buffers? For now we do the latter | |
464 | because it works with 2.2 still */ | |
465 | { | |
466 | unsigned char *from = (unsigned char *) &tmpmailbox; | |
467 | void __iomem *to = apbs[IndexCard].RamIO + RAM_FROM_PC; | |
468 | int c; | |
469 | ||
470 | for (c = 0; c < sizeof(struct mailbox); c++) | |
471 | writeb(*(from++), to++); | |
472 | } | |
473 | ||
474 | writeb(0x20, apbs[IndexCard].RamIO + TIC_OWNER_FROM_PC); | |
475 | writeb(0xff, apbs[IndexCard].RamIO + NUMCARD_OWNER_FROM_PC); | |
476 | writeb(TicCard, apbs[IndexCard].RamIO + TIC_DES_FROM_PC); | |
477 | writeb(NumCard, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC); | |
478 | writeb(2, apbs[IndexCard].RamIO + DATA_FROM_PC_READY); | |
479 | writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); | |
480 | Dummy = readb(apbs[IndexCard].RamIO + VERS); | |
481 | spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags); | |
482 | return 0; | |
483 | } | |
484 | ||
485 | static int do_ac_read(int IndexCard, char __user *buf, | |
486 | struct st_ram_io *st_loc, struct mailbox *mailbox) | |
487 | { | |
488 | void __iomem *from = apbs[IndexCard].RamIO + RAM_TO_PC; | |
bc20589b | 489 | unsigned char *to = (unsigned char *)mailbox; |
1da177e4 LT |
490 | #ifdef DEBUG |
491 | int c; | |
492 | #endif | |
493 | ||
494 | st_loc->tic_owner_to_pc = readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC); | |
495 | st_loc->numcard_owner_to_pc = readb(apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC); | |
496 | ||
497 | ||
498 | { | |
499 | int c; | |
500 | ||
501 | for (c = 0; c < sizeof(struct mailbox); c++) | |
502 | *(to++) = readb(from++); | |
503 | } | |
504 | writeb(1, apbs[IndexCard].RamIO + ACK_FROM_PC_READY); | |
505 | writeb(1, apbs[IndexCard].RamIO + TYP_ACK_FROM_PC); | |
506 | writeb(IndexCard+1, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC); | |
507 | writeb(readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC), | |
508 | apbs[IndexCard].RamIO + TIC_ACK_FROM_PC); | |
509 | writeb(2, apbs[IndexCard].RamIO + ACK_FROM_PC_READY); | |
510 | writeb(0, apbs[IndexCard].RamIO + DATA_TO_PC_READY); | |
511 | writeb(2, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); | |
512 | Dummy = readb(apbs[IndexCard].RamIO + VERS); | |
513 | ||
514 | #ifdef DEBUG | |
515 | printk("Read from applicom card #%d. struct st_ram_io follows:", NumCard); | |
516 | ||
517 | for (c = 0; c < sizeof(struct st_ram_io);) { | |
518 | printk("\n%5.5X: %2.2X", c, ((unsigned char *)st_loc)[c]); | |
519 | ||
520 | for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) { | |
521 | printk(" %2.2X", ((unsigned char *)st_loc)[c]); | |
522 | } | |
523 | } | |
524 | ||
525 | printk("\nstruct mailbox follows:"); | |
526 | ||
527 | for (c = 0; c < sizeof(struct mailbox);) { | |
528 | printk("\n%5.5X: %2.2X", c, ((unsigned char *)mailbox)[c]); | |
529 | ||
530 | for (c++; c % 8 && c < sizeof(struct mailbox); c++) { | |
531 | printk(" %2.2X", ((unsigned char *)mailbox)[c]); | |
532 | } | |
533 | } | |
534 | printk("\n"); | |
535 | #endif | |
536 | return (sizeof(struct st_ram_io) + sizeof(struct mailbox)); | |
537 | } | |
538 | ||
539 | static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_t *ptr) | |
540 | { | |
541 | unsigned long flags; | |
542 | unsigned int i; | |
543 | unsigned char tmp; | |
544 | int ret = 0; | |
545 | DECLARE_WAITQUEUE(wait, current); | |
546 | #ifdef DEBUG | |
547 | int loopcount=0; | |
548 | #endif | |
549 | /* No need to ratelimit this. Only root can trigger it anyway */ | |
550 | if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) { | |
551 | printk( KERN_WARNING "Hmmm. read() of Applicom card, length %zd != expected %zd\n", | |
552 | count,sizeof(struct st_ram_io) + sizeof(struct mailbox)); | |
553 | return -EINVAL; | |
554 | } | |
555 | ||
556 | while(1) { | |
557 | /* Stick ourself on the wait queue */ | |
558 | set_current_state(TASK_INTERRUPTIBLE); | |
559 | add_wait_queue(&FlagSleepRec, &wait); | |
560 | ||
561 | /* Scan each board, looking for one which has a packet for us */ | |
562 | for (i=0; i < MAX_BOARD; i++) { | |
563 | if (!apbs[i].RamIO) | |
564 | continue; | |
565 | spin_lock_irqsave(&apbs[i].mutex, flags); | |
566 | ||
567 | tmp = readb(apbs[i].RamIO + DATA_TO_PC_READY); | |
568 | ||
569 | if (tmp == 2) { | |
570 | struct st_ram_io st_loc; | |
571 | struct mailbox mailbox; | |
572 | ||
573 | /* Got a packet for us */ | |
19714a8a | 574 | memset(&st_loc, 0, sizeof(st_loc)); |
1da177e4 LT |
575 | ret = do_ac_read(i, buf, &st_loc, &mailbox); |
576 | spin_unlock_irqrestore(&apbs[i].mutex, flags); | |
577 | set_current_state(TASK_RUNNING); | |
578 | remove_wait_queue(&FlagSleepRec, &wait); | |
579 | ||
580 | if (copy_to_user(buf, &st_loc, sizeof(st_loc))) | |
581 | return -EFAULT; | |
582 | if (copy_to_user(buf + sizeof(st_loc), &mailbox, sizeof(mailbox))) | |
583 | return -EFAULT; | |
584 | return tmp; | |
585 | } | |
586 | ||
587 | if (tmp > 2) { | |
588 | /* Got an error */ | |
589 | Dummy = readb(apbs[i].RamIO + VERS); | |
590 | ||
591 | spin_unlock_irqrestore(&apbs[i].mutex, flags); | |
592 | set_current_state(TASK_RUNNING); | |
593 | remove_wait_queue(&FlagSleepRec, &wait); | |
594 | ||
595 | printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n", | |
596 | i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY)); | |
597 | DeviceErrorCount++; | |
598 | return -EIO; | |
599 | } | |
600 | ||
601 | /* Nothing for us. Try the next board */ | |
602 | Dummy = readb(apbs[i].RamIO + VERS); | |
603 | spin_unlock_irqrestore(&apbs[i].mutex, flags); | |
604 | ||
605 | } /* per board */ | |
606 | ||
607 | /* OK - No boards had data for us. Sleep now */ | |
608 | ||
609 | schedule(); | |
610 | remove_wait_queue(&FlagSleepRec, &wait); | |
611 | ||
612 | if (signal_pending(current)) | |
613 | return -EINTR; | |
614 | ||
615 | #ifdef DEBUG | |
616 | if (loopcount++ > 2) { | |
56003191 | 617 | printk(KERN_DEBUG "Looping in ac_read. loopcount %d\n", loopcount); |
1da177e4 LT |
618 | } |
619 | #endif | |
620 | } | |
621 | } | |
622 | ||
7d12e780 | 623 | static irqreturn_t ac_interrupt(int vec, void *dev_instance) |
1da177e4 LT |
624 | { |
625 | unsigned int i; | |
626 | unsigned int FlagInt; | |
627 | unsigned int LoopCount; | |
628 | int handled = 0; | |
629 | ||
630 | // printk("Applicom interrupt on IRQ %d occurred\n", vec); | |
631 | ||
632 | LoopCount = 0; | |
633 | ||
634 | do { | |
635 | FlagInt = 0; | |
636 | for (i = 0; i < MAX_BOARD; i++) { | |
637 | ||
638 | /* Skip if this board doesn't exist */ | |
639 | if (!apbs[i].RamIO) | |
640 | continue; | |
641 | ||
642 | spin_lock(&apbs[i].mutex); | |
643 | ||
644 | /* Skip if this board doesn't want attention */ | |
645 | if(readb(apbs[i].RamIO + RAM_IT_TO_PC) == 0) { | |
646 | spin_unlock(&apbs[i].mutex); | |
647 | continue; | |
648 | } | |
649 | ||
650 | handled = 1; | |
651 | FlagInt = 1; | |
652 | writeb(0, apbs[i].RamIO + RAM_IT_TO_PC); | |
653 | ||
654 | if (readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2) { | |
655 | printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n", | |
656 | i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY)); | |
657 | DeviceErrorCount++; | |
658 | } | |
659 | ||
660 | if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) && | |
661 | (readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) { | |
662 | ||
663 | printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n", | |
664 | i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY)); | |
665 | DeviceErrorCount++; | |
666 | } | |
667 | ||
668 | if (readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2) { /* mailbox sent by the card ? */ | |
669 | if (waitqueue_active(&FlagSleepRec)) { | |
670 | wake_up_interruptible(&FlagSleepRec); | |
671 | } | |
672 | } | |
673 | ||
674 | if (readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0) { /* ram i/o free for write by pc ? */ | |
675 | if (waitqueue_active(&apbs[i].FlagSleepSend)) { /* process sleep during read ? */ | |
676 | wake_up_interruptible(&apbs[i].FlagSleepSend); | |
677 | } | |
678 | } | |
679 | Dummy = readb(apbs[i].RamIO + VERS); | |
680 | ||
681 | if(readb(apbs[i].RamIO + RAM_IT_TO_PC)) { | |
682 | /* There's another int waiting on this card */ | |
683 | spin_unlock(&apbs[i].mutex); | |
684 | i--; | |
685 | } else { | |
686 | spin_unlock(&apbs[i].mutex); | |
687 | } | |
688 | } | |
689 | if (FlagInt) | |
690 | LoopCount = 0; | |
691 | else | |
692 | LoopCount++; | |
693 | } while(LoopCount < 2); | |
694 | return IRQ_RETVAL(handled); | |
695 | } | |
696 | ||
697 | ||
698 | ||
55929332 | 699 | static long ac_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
1da177e4 LT |
700 | |
701 | { /* @ ADG ou ATO selon le cas */ | |
702 | int i; | |
703 | unsigned char IndexCard; | |
704 | void __iomem *pmem; | |
705 | int ret = 0; | |
d7ac3c6e | 706 | static int warncount = 10; |
1da177e4 LT |
707 | volatile unsigned char byte_reset_it; |
708 | struct st_ram_io *adgl; | |
709 | void __user *argp = (void __user *)arg; | |
710 | ||
711 | /* In general, the device is only openable by root anyway, so we're not | |
712 | particularly concerned that bogus ioctls can flood the console. */ | |
713 | ||
f67231f8 JL |
714 | adgl = memdup_user(argp, sizeof(struct st_ram_io)); |
715 | if (IS_ERR(adgl)) | |
716 | return PTR_ERR(adgl); | |
55929332 | 717 | |
613655fa | 718 | mutex_lock(&ac_mutex); |
1da177e4 LT |
719 | IndexCard = adgl->num_card-1; |
720 | ||
d7ac3c6e GS |
721 | if (cmd != 6 && IndexCard >= MAX_BOARD) |
722 | goto err; | |
723 | IndexCard = array_index_nospec(IndexCard, MAX_BOARD); | |
724 | ||
725 | if (cmd != 6 && !apbs[IndexCard].RamIO) | |
726 | goto err; | |
1da177e4 LT |
727 | |
728 | switch (cmd) { | |
729 | ||
730 | case 0: | |
731 | pmem = apbs[IndexCard].RamIO; | |
732 | for (i = 0; i < sizeof(struct st_ram_io); i++) | |
733 | ((unsigned char *)adgl)[i]=readb(pmem++); | |
734 | if (copy_to_user(argp, adgl, sizeof(struct st_ram_io))) | |
735 | ret = -EFAULT; | |
736 | break; | |
737 | case 1: | |
738 | pmem = apbs[IndexCard].RamIO + CONF_END_TEST; | |
739 | for (i = 0; i < 4; i++) | |
740 | adgl->conf_end_test[i] = readb(pmem++); | |
741 | for (i = 0; i < 2; i++) | |
742 | adgl->error_code[i] = readb(pmem++); | |
743 | for (i = 0; i < 4; i++) | |
744 | adgl->parameter_error[i] = readb(pmem++); | |
745 | pmem = apbs[IndexCard].RamIO + VERS; | |
746 | adgl->vers = readb(pmem); | |
747 | pmem = apbs[IndexCard].RamIO + TYPE_CARD; | |
748 | for (i = 0; i < 20; i++) | |
749 | adgl->reserv1[i] = readb(pmem++); | |
750 | *(int *)&adgl->reserv1[20] = | |
751 | (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) + | |
752 | (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) + | |
753 | (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) ); | |
754 | ||
755 | if (copy_to_user(argp, adgl, sizeof(struct st_ram_io))) | |
756 | ret = -EFAULT; | |
757 | break; | |
758 | case 2: | |
759 | pmem = apbs[IndexCard].RamIO + CONF_END_TEST; | |
760 | for (i = 0; i < 10; i++) | |
761 | writeb(0xff, pmem++); | |
762 | writeb(adgl->data_from_pc_ready, | |
763 | apbs[IndexCard].RamIO + DATA_FROM_PC_READY); | |
764 | ||
765 | writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); | |
766 | ||
767 | for (i = 0; i < MAX_BOARD; i++) { | |
768 | if (apbs[i].RamIO) { | |
769 | byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC); | |
770 | } | |
771 | } | |
772 | break; | |
773 | case 3: | |
774 | pmem = apbs[IndexCard].RamIO + TIC_DES_FROM_PC; | |
775 | writeb(adgl->tic_des_from_pc, pmem); | |
776 | break; | |
777 | case 4: | |
778 | pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC; | |
779 | adgl->tic_owner_to_pc = readb(pmem++); | |
780 | adgl->numcard_owner_to_pc = readb(pmem); | |
781 | if (copy_to_user(argp, adgl,sizeof(struct st_ram_io))) | |
782 | ret = -EFAULT; | |
783 | break; | |
784 | case 5: | |
785 | writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC); | |
786 | writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC); | |
787 | writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC); | |
788 | writeb(4, apbs[IndexCard].RamIO + DATA_FROM_PC_READY); | |
789 | writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); | |
790 | break; | |
791 | case 6: | |
792 | printk(KERN_INFO "APPLICOM driver release .... V2.8.0 ($Revision: 1.30 $)\n"); | |
793 | printk(KERN_INFO "Number of installed boards . %d\n", (int) numboards); | |
794 | printk(KERN_INFO "Segment of board ........... %X\n", (int) mem); | |
795 | printk(KERN_INFO "Interrupt IRQ number ....... %d\n", (int) irq); | |
796 | for (i = 0; i < MAX_BOARD; i++) { | |
797 | int serial; | |
798 | char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1]; | |
799 | ||
800 | if (!apbs[i].RamIO) | |
801 | continue; | |
802 | ||
803 | for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++) | |
804 | boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial); | |
805 | boardname[serial] = 0; | |
806 | ||
807 | printk(KERN_INFO "Prom version board %d ....... V%d.%d %s", | |
808 | i+1, | |
2154e0a4 DC |
809 | (int)(readb(apbs[i].RamIO + VERS) >> 4), |
810 | (int)(readb(apbs[i].RamIO + VERS) & 0xF), | |
1da177e4 LT |
811 | boardname); |
812 | ||
813 | ||
814 | serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + | |
815 | (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + | |
816 | (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) ); | |
817 | ||
818 | if (serial != 0) | |
819 | printk(" S/N %d\n", serial); | |
820 | else | |
821 | printk("\n"); | |
822 | } | |
823 | if (DeviceErrorCount != 0) | |
824 | printk(KERN_INFO "DeviceErrorCount ........... %d\n", DeviceErrorCount); | |
825 | if (ReadErrorCount != 0) | |
826 | printk(KERN_INFO "ReadErrorCount ............. %d\n", ReadErrorCount); | |
827 | if (WriteErrorCount != 0) | |
828 | printk(KERN_INFO "WriteErrorCount ............ %d\n", WriteErrorCount); | |
829 | if (waitqueue_active(&FlagSleepRec)) | |
830 | printk(KERN_INFO "Process in read pending\n"); | |
831 | for (i = 0; i < MAX_BOARD; i++) { | |
832 | if (apbs[i].RamIO && waitqueue_active(&apbs[i].FlagSleepSend)) | |
833 | printk(KERN_INFO "Process in write pending board %d\n",i+1); | |
834 | } | |
835 | break; | |
836 | default: | |
a7be18d4 | 837 | ret = -ENOTTY; |
1da177e4 LT |
838 | break; |
839 | } | |
840 | Dummy = readb(apbs[IndexCard].RamIO + VERS); | |
841 | kfree(adgl); | |
613655fa | 842 | mutex_unlock(&ac_mutex); |
1da177e4 | 843 | return 0; |
d7ac3c6e GS |
844 | |
845 | err: | |
846 | if (warncount) { | |
847 | pr_warn("APPLICOM driver IOCTL, bad board number %d\n", | |
848 | (int)IndexCard + 1); | |
849 | warncount--; | |
850 | } | |
851 | kfree(adgl); | |
852 | mutex_unlock(&ac_mutex); | |
853 | return -EINVAL; | |
854 | ||
1da177e4 LT |
855 | } |
856 |