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Merge tag 'ceph-for-4.13-rc8' of git://github.com/ceph/ceph-client
[linux/fpc-iii.git] / drivers / parport / procfs.c
blob8ee44a104ac47939f7693370143c78135c3735c6
1 /* Sysctl interface for parport devices.
2 *
3 * Authors: David Campbell
4 * Tim Waugh <tim@cyberelk.demon.co.uk>
5 * Philip Blundell <philb@gnu.org>
6 * Andrea Arcangeli
7 * Riccardo Facchetti <fizban@tin.it>
8 *
9 * based on work by Grant Guenther <grant@torque.net>
10 * and Philip Blundell
11 *
12 * Cleaned up include files - Russell King <linux@arm.uk.linux.org>
13 */
14
15 #include <linux/string.h>
16 #include <linux/init.h>
17 #include <linux/module.h>
18 #include <linux/errno.h>
19 #include <linux/kernel.h>
20 #include <linux/slab.h>
21 #include <linux/parport.h>
22 #include <linux/ctype.h>
23 #include <linux/sysctl.h>
24 #include <linux/device.h>
25
26 #include <linux/uaccess.h>
27
28 #if defined(CONFIG_SYSCTL) && defined(CONFIG_PROC_FS)
29
30 #define PARPORT_MIN_TIMESLICE_VALUE 1ul
31 #define PARPORT_MAX_TIMESLICE_VALUE ((unsigned long) HZ)
32 #define PARPORT_MIN_SPINTIME_VALUE 1
33 #define PARPORT_MAX_SPINTIME_VALUE 1000
34
35 static int do_active_device(struct ctl_table *table, int write,
36 void __user *result, size_t *lenp, loff_t *ppos)
37 {
38 struct parport *port = (struct parport *)table->extra1;
39 char buffer[256];
40 struct pardevice *dev;
41 int len = 0;
42
43 if (write) /* can't happen anyway */
44 return -EACCES;
45
46 if (*ppos) {
47 *lenp = 0;
48 return 0;
49 }
50
51 for (dev = port->devices; dev ; dev = dev->next) {
52 if(dev == port->cad) {
53 len += sprintf(buffer, "%s\n", dev->name);
54 }
55 }
56
57 if(!len) {
58 len += sprintf(buffer, "%s\n", "none");
59 }
60
61 if (len > *lenp)
62 len = *lenp;
63 else
64 *lenp = len;
65
66 *ppos += len;
67
68 return copy_to_user(result, buffer, len) ? -EFAULT : 0;
69 }
70
71 #ifdef CONFIG_PARPORT_1284
72 static int do_autoprobe(struct ctl_table *table, int write,
73 void __user *result, size_t *lenp, loff_t *ppos)
74 {
75 struct parport_device_info *info = table->extra2;
76 const char *str;
77 char buffer[256];
78 int len = 0;
79
80 if (write) /* permissions stop this */
81 return -EACCES;
82
83 if (*ppos) {
84 *lenp = 0;
85 return 0;
86 }
87
88 if ((str = info->class_name) != NULL)
89 len += sprintf (buffer + len, "CLASS:%s;\n", str);
90
91 if ((str = info->model) != NULL)
92 len += sprintf (buffer + len, "MODEL:%s;\n", str);
93
94 if ((str = info->mfr) != NULL)
95 len += sprintf (buffer + len, "MANUFACTURER:%s;\n", str);
96
97 if ((str = info->description) != NULL)
98 len += sprintf (buffer + len, "DESCRIPTION:%s;\n", str);
99
100 if ((str = info->cmdset) != NULL)
101 len += sprintf (buffer + len, "COMMAND SET:%s;\n", str);
102
103 if (len > *lenp)
104 len = *lenp;
105 else
106 *lenp = len;
107
108 *ppos += len;
109
110 return copy_to_user (result, buffer, len) ? -EFAULT : 0;
111 }
112 #endif /* IEEE1284.3 support. */
113
114 static int do_hardware_base_addr(struct ctl_table *table, int write,
115 void __user *result,
116 size_t *lenp, loff_t *ppos)
117 {
118 struct parport *port = (struct parport *)table->extra1;
119 char buffer[20];
120 int len = 0;
121
122 if (*ppos) {
123 *lenp = 0;
124 return 0;
125 }
126
127 if (write) /* permissions prevent this anyway */
128 return -EACCES;
129
130 len += sprintf (buffer, "%lu\t%lu\n", port->base, port->base_hi);
131
132 if (len > *lenp)
133 len = *lenp;
134 else
135 *lenp = len;
136
137 *ppos += len;
138
139 return copy_to_user(result, buffer, len) ? -EFAULT : 0;
140 }
141
142 static int do_hardware_irq(struct ctl_table *table, int write,
143 void __user *result,
144 size_t *lenp, loff_t *ppos)
145 {
146 struct parport *port = (struct parport *)table->extra1;
147 char buffer[20];
148 int len = 0;
149
150 if (*ppos) {
151 *lenp = 0;
152 return 0;
153 }
154
155 if (write) /* permissions prevent this anyway */
156 return -EACCES;
157
158 len += sprintf (buffer, "%d\n", port->irq);
159
160 if (len > *lenp)
161 len = *lenp;
162 else
163 *lenp = len;
164
165 *ppos += len;
166
167 return copy_to_user(result, buffer, len) ? -EFAULT : 0;
168 }
169
170 static int do_hardware_dma(struct ctl_table *table, int write,
171 void __user *result,
172 size_t *lenp, loff_t *ppos)
173 {
174 struct parport *port = (struct parport *)table->extra1;
175 char buffer[20];
176 int len = 0;
177
178 if (*ppos) {
179 *lenp = 0;
180 return 0;
181 }
182
183 if (write) /* permissions prevent this anyway */
184 return -EACCES;
185
186 len += sprintf (buffer, "%d\n", port->dma);
187
188 if (len > *lenp)
189 len = *lenp;
190 else
191 *lenp = len;
192
193 *ppos += len;
194
195 return copy_to_user(result, buffer, len) ? -EFAULT : 0;
196 }
197
198 static int do_hardware_modes(struct ctl_table *table, int write,
199 void __user *result,
200 size_t *lenp, loff_t *ppos)
201 {
202 struct parport *port = (struct parport *)table->extra1;
203 char buffer[40];
204 int len = 0;
205
206 if (*ppos) {
207 *lenp = 0;
208 return 0;
209 }
210
211 if (write) /* permissions prevent this anyway */
212 return -EACCES;
213
214 {
215 #define printmode(x) {if(port->modes&PARPORT_MODE_##x){len+=sprintf(buffer+len,"%s%s",f?",":"",#x);f++;}}
216 int f = 0;
217 printmode(PCSPP);
218 printmode(TRISTATE);
219 printmode(COMPAT);
220 printmode(EPP);
221 printmode(ECP);
222 printmode(DMA);
223 #undef printmode
224 }
225 buffer[len++] = '\n';
226
227 if (len > *lenp)
228 len = *lenp;
229 else
230 *lenp = len;
231
232 *ppos += len;
233
234 return copy_to_user(result, buffer, len) ? -EFAULT : 0;
235 }
236
237 #define PARPORT_PORT_DIR(CHILD) { .procname = NULL, .mode = 0555, .child = CHILD }
238 #define PARPORT_PARPORT_DIR(CHILD) { .procname = "parport", \
239 .mode = 0555, .child = CHILD }
240 #define PARPORT_DEV_DIR(CHILD) { .procname = "dev", .mode = 0555, .child = CHILD }
241 #define PARPORT_DEVICES_ROOT_DIR { .procname = "devices", \
242 .mode = 0555, .child = NULL }
243
244 static const unsigned long parport_min_timeslice_value =
245 PARPORT_MIN_TIMESLICE_VALUE;
246
247 static const unsigned long parport_max_timeslice_value =
248 PARPORT_MAX_TIMESLICE_VALUE;
249
250 static const int parport_min_spintime_value =
251 PARPORT_MIN_SPINTIME_VALUE;
252
253 static const int parport_max_spintime_value =
254 PARPORT_MAX_SPINTIME_VALUE;
255
256
257 struct parport_sysctl_table {
258 struct ctl_table_header *sysctl_header;
259 struct ctl_table vars[12];
260 struct ctl_table device_dir[2];
261 struct ctl_table port_dir[2];
262 struct ctl_table parport_dir[2];
263 struct ctl_table dev_dir[2];
264 };
265
266 static const struct parport_sysctl_table parport_sysctl_template = {
267 .sysctl_header = NULL,
268 {
269 {
270 .procname = "spintime",
271 .data = NULL,
272 .maxlen = sizeof(int),
273 .mode = 0644,
274 .proc_handler = proc_dointvec_minmax,
275 .extra1 = (void*) &parport_min_spintime_value,
276 .extra2 = (void*) &parport_max_spintime_value
277 },
278 {
279 .procname = "base-addr",
280 .data = NULL,
281 .maxlen = 0,
282 .mode = 0444,
283 .proc_handler = do_hardware_base_addr
284 },
285 {
286 .procname = "irq",
287 .data = NULL,
288 .maxlen = 0,
289 .mode = 0444,
290 .proc_handler = do_hardware_irq
291 },
292 {
293 .procname = "dma",
294 .data = NULL,
295 .maxlen = 0,
296 .mode = 0444,
297 .proc_handler = do_hardware_dma
298 },
299 {
300 .procname = "modes",
301 .data = NULL,
302 .maxlen = 0,
303 .mode = 0444,
304 .proc_handler = do_hardware_modes
305 },
306 PARPORT_DEVICES_ROOT_DIR,
307 #ifdef CONFIG_PARPORT_1284
308 {
309 .procname = "autoprobe",
310 .data = NULL,
311 .maxlen = 0,
312 .mode = 0444,
313 .proc_handler = do_autoprobe
314 },
315 {
316 .procname = "autoprobe0",
317 .data = NULL,
318 .maxlen = 0,
319 .mode = 0444,
320 .proc_handler = do_autoprobe
321 },
322 {
323 .procname = "autoprobe1",
324 .data = NULL,
325 .maxlen = 0,
326 .mode = 0444,
327 .proc_handler = do_autoprobe
328 },
329 {
330 .procname = "autoprobe2",
331 .data = NULL,
332 .maxlen = 0,
333 .mode = 0444,
334 .proc_handler = do_autoprobe
335 },
336 {
337 .procname = "autoprobe3",
338 .data = NULL,
339 .maxlen = 0,
340 .mode = 0444,
341 .proc_handler = do_autoprobe
342 },
343 #endif /* IEEE 1284 support */
344 {}
345 },
346 {
347 {
348 .procname = "active",
349 .data = NULL,
350 .maxlen = 0,
351 .mode = 0444,
352 .proc_handler = do_active_device
353 },
354 {}
355 },
356 {
357 PARPORT_PORT_DIR(NULL),
358 {}
359 },
360 {
361 PARPORT_PARPORT_DIR(NULL),
362 {}
363 },
364 {
365 PARPORT_DEV_DIR(NULL),
366 {}
367 }
368 };
369
370 struct parport_device_sysctl_table
371 {
372 struct ctl_table_header *sysctl_header;
373 struct ctl_table vars[2];
374 struct ctl_table device_dir[2];
375 struct ctl_table devices_root_dir[2];
376 struct ctl_table port_dir[2];
377 struct ctl_table parport_dir[2];
378 struct ctl_table dev_dir[2];
379 };
380
381 static const struct parport_device_sysctl_table
382 parport_device_sysctl_template = {
383 .sysctl_header = NULL,
384 {
385 {
386 .procname = "timeslice",
387 .data = NULL,
388 .maxlen = sizeof(unsigned long),
389 .mode = 0644,
390 .proc_handler = proc_doulongvec_ms_jiffies_minmax,
391 .extra1 = (void*) &parport_min_timeslice_value,
392 .extra2 = (void*) &parport_max_timeslice_value
393 },
394 },
395 {
396 {
397 .procname = NULL,
398 .data = NULL,
399 .maxlen = 0,
400 .mode = 0555,
401 .child = NULL
402 },
403 {}
404 },
405 {
406 PARPORT_DEVICES_ROOT_DIR,
407 {}
408 },
409 {
410 PARPORT_PORT_DIR(NULL),
411 {}
412 },
413 {
414 PARPORT_PARPORT_DIR(NULL),
415 {}
416 },
417 {
418 PARPORT_DEV_DIR(NULL),
419 {}
420 }
421 };
422
423 struct parport_default_sysctl_table
424 {
425 struct ctl_table_header *sysctl_header;
426 struct ctl_table vars[3];
427 struct ctl_table default_dir[2];
428 struct ctl_table parport_dir[2];
429 struct ctl_table dev_dir[2];
430 };
431
432 static struct parport_default_sysctl_table
433 parport_default_sysctl_table = {
434 .sysctl_header = NULL,
435 {
436 {
437 .procname = "timeslice",
438 .data = &parport_default_timeslice,
439 .maxlen = sizeof(parport_default_timeslice),
440 .mode = 0644,
441 .proc_handler = proc_doulongvec_ms_jiffies_minmax,
442 .extra1 = (void*) &parport_min_timeslice_value,
443 .extra2 = (void*) &parport_max_timeslice_value
444 },
445 {
446 .procname = "spintime",
447 .data = &parport_default_spintime,
448 .maxlen = sizeof(parport_default_spintime),
449 .mode = 0644,
450 .proc_handler = proc_dointvec_minmax,
451 .extra1 = (void*) &parport_min_spintime_value,
452 .extra2 = (void*) &parport_max_spintime_value
453 },
454 {}
455 },
456 {
457 {
458 .procname = "default",
459 .mode = 0555,
460 .child = parport_default_sysctl_table.vars
461 },
462 {}
463 },
464 {
465 PARPORT_PARPORT_DIR(parport_default_sysctl_table.default_dir),
466 {}
467 },
468 {
469 PARPORT_DEV_DIR(parport_default_sysctl_table.parport_dir),
470 {}
471 }
472 };
473
474
475 int parport_proc_register(struct parport *port)
476 {
477 struct parport_sysctl_table *t;
478 int i;
479
480 t = kmemdup(&parport_sysctl_template, sizeof(*t), GFP_KERNEL);
481 if (t == NULL)
482 return -ENOMEM;
483
484 t->device_dir[0].extra1 = port;
485
486 for (i = 0; i < 5; i++)
487 t->vars[i].extra1 = port;
488
489 t->vars[0].data = &port->spintime;
490 t->vars[5].child = t->device_dir;
491
492 for (i = 0; i < 5; i++)
493 t->vars[6 + i].extra2 = &port->probe_info[i];
494
495 t->port_dir[0].procname = port->name;
496
497 t->port_dir[0].child = t->vars;
498 t->parport_dir[0].child = t->port_dir;
499 t->dev_dir[0].child = t->parport_dir;
500
501 t->sysctl_header = register_sysctl_table(t->dev_dir);
502 if (t->sysctl_header == NULL) {
503 kfree(t);
504 t = NULL;
505 }
506 port->sysctl_table = t;
507 return 0;
508 }
509
510 int parport_proc_unregister(struct parport *port)
511 {
512 if (port->sysctl_table) {
513 struct parport_sysctl_table *t = port->sysctl_table;
514 port->sysctl_table = NULL;
515 unregister_sysctl_table(t->sysctl_header);
516 kfree(t);
517 }
518 return 0;
519 }
520
521 int parport_device_proc_register(struct pardevice *device)
522 {
523 struct parport_device_sysctl_table *t;
524 struct parport * port = device->port;
525
526 t = kmemdup(&parport_device_sysctl_template, sizeof(*t), GFP_KERNEL);
527 if (t == NULL)
528 return -ENOMEM;
529
530 t->dev_dir[0].child = t->parport_dir;
531 t->parport_dir[0].child = t->port_dir;
532 t->port_dir[0].procname = port->name;
533 t->port_dir[0].child = t->devices_root_dir;
534 t->devices_root_dir[0].child = t->device_dir;
535
536 t->device_dir[0].procname = device->name;
537 t->device_dir[0].child = t->vars;
538 t->vars[0].data = &device->timeslice;
539
540 t->sysctl_header = register_sysctl_table(t->dev_dir);
541 if (t->sysctl_header == NULL) {
542 kfree(t);
543 t = NULL;
544 }
545 device->sysctl_table = t;
546 return 0;
547 }
548
549 int parport_device_proc_unregister(struct pardevice *device)
550 {
551 if (device->sysctl_table) {
552 struct parport_device_sysctl_table *t = device->sysctl_table;
553 device->sysctl_table = NULL;
554 unregister_sysctl_table(t->sysctl_header);
555 kfree(t);
556 }
557 return 0;
558 }
559
560 static int __init parport_default_proc_register(void)
561 {
562 int ret;
563
564 parport_default_sysctl_table.sysctl_header =
565 register_sysctl_table(parport_default_sysctl_table.dev_dir);
566 if (!parport_default_sysctl_table.sysctl_header)
567 return -ENOMEM;
568 ret = parport_bus_init();
569 if (ret) {
570 unregister_sysctl_table(parport_default_sysctl_table.
571 sysctl_header);
572 return ret;
573 }
574 return 0;
575 }
576
577 static void __exit parport_default_proc_unregister(void)
578 {
579 if (parport_default_sysctl_table.sysctl_header) {
580 unregister_sysctl_table(parport_default_sysctl_table.
581 sysctl_header);
582 parport_default_sysctl_table.sysctl_header = NULL;
583 }
584 parport_bus_exit();
585 }
586
587 #else /* no sysctl or no procfs*/
588
589 int parport_proc_register(struct parport *pp)
590 {
591 return 0;
592 }
593
594 int parport_proc_unregister(struct parport *pp)
595 {
596 return 0;
597 }
598
599 int parport_device_proc_register(struct pardevice *device)
600 {
601 return 0;
602 }
603
604 int parport_device_proc_unregister(struct pardevice *device)
605 {
606 return 0;
607 }
608
609 static int __init parport_default_proc_register (void)
610 {
611 return parport_bus_init();
612 }
613
614 static void __exit parport_default_proc_unregister (void)
615 {
616 parport_bus_exit();
617 }
618 #endif
619
620 subsys_initcall(parport_default_proc_register)
621 module_exit(parport_default_proc_unregister)
Linux with added FPC-III support