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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* Sysctl interface for parport devices.
2 *
Adrian Bunkbdca3f22006-06-26 18:19:23 +02003 * Authors: David Campbell
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 * 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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016#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
25#include <asm/uaccess.h>
26
27#if defined(CONFIG_SYSCTL) && defined(CONFIG_PROC_FS)
28
29#define PARPORT_MIN_TIMESLICE_VALUE 1ul
30#define PARPORT_MAX_TIMESLICE_VALUE ((unsigned long) HZ)
31#define PARPORT_MIN_SPINTIME_VALUE 1
32#define PARPORT_MAX_SPINTIME_VALUE 1000
33
34static int do_active_device(ctl_table *table, int write, struct file *filp,
35 void __user *result, size_t *lenp, loff_t *ppos)
36{
37 struct parport *port = (struct parport *)table->extra1;
38 char buffer[256];
39 struct pardevice *dev;
40 int len = 0;
41
42 if (write) /* can't happen anyway */
43 return -EACCES;
44
45 if (*ppos) {
46 *lenp = 0;
47 return 0;
48 }
49
50 for (dev = port->devices; dev ; dev = dev->next) {
51 if(dev == port->cad) {
52 len += sprintf(buffer, "%s\n", dev->name);
53 }
54 }
55
56 if(!len) {
57 len += sprintf(buffer, "%s\n", "none");
58 }
59
60 if (len > *lenp)
61 len = *lenp;
62 else
63 *lenp = len;
64
65 *ppos += len;
66
67 return copy_to_user(result, buffer, len) ? -EFAULT : 0;
68}
69
70#ifdef CONFIG_PARPORT_1284
71static int do_autoprobe(ctl_table *table, int write, struct file *filp,
72 void __user *result, size_t *lenp, loff_t *ppos)
73{
74 struct parport_device_info *info = table->extra2;
75 const char *str;
76 char buffer[256];
77 int len = 0;
78
79 if (write) /* permissions stop this */
80 return -EACCES;
81
82 if (*ppos) {
83 *lenp = 0;
84 return 0;
85 }
86
87 if ((str = info->class_name) != NULL)
88 len += sprintf (buffer + len, "CLASS:%s;\n", str);
89
90 if ((str = info->model) != NULL)
91 len += sprintf (buffer + len, "MODEL:%s;\n", str);
92
93 if ((str = info->mfr) != NULL)
94 len += sprintf (buffer + len, "MANUFACTURER:%s;\n", str);
95
96 if ((str = info->description) != NULL)
97 len += sprintf (buffer + len, "DESCRIPTION:%s;\n", str);
98
99 if ((str = info->cmdset) != NULL)
100 len += sprintf (buffer + len, "COMMAND SET:%s;\n", str);
101
102 if (len > *lenp)
103 len = *lenp;
104 else
105 *lenp = len;
106
107 *ppos += len;
108
109 return copy_to_user (result, buffer, len) ? -EFAULT : 0;
110}
111#endif /* IEEE1284.3 support. */
112
113static int do_hardware_base_addr (ctl_table *table, int write,
114 struct file *filp, void __user *result,
115 size_t *lenp, loff_t *ppos)
116{
117 struct parport *port = (struct parport *)table->extra1;
118 char buffer[20];
119 int len = 0;
120
121 if (*ppos) {
122 *lenp = 0;
123 return 0;
124 }
125
126 if (write) /* permissions prevent this anyway */
127 return -EACCES;
128
129 len += sprintf (buffer, "%lu\t%lu\n", port->base, port->base_hi);
130
131 if (len > *lenp)
132 len = *lenp;
133 else
134 *lenp = len;
135
136 *ppos += len;
137
138 return copy_to_user(result, buffer, len) ? -EFAULT : 0;
139}
140
141static int do_hardware_irq (ctl_table *table, int write,
142 struct file *filp, void __user *result,
143 size_t *lenp, loff_t *ppos)
144{
145 struct parport *port = (struct parport *)table->extra1;
146 char buffer[20];
147 int len = 0;
148
149 if (*ppos) {
150 *lenp = 0;
151 return 0;
152 }
153
154 if (write) /* permissions prevent this anyway */
155 return -EACCES;
156
157 len += sprintf (buffer, "%d\n", port->irq);
158
159 if (len > *lenp)
160 len = *lenp;
161 else
162 *lenp = len;
163
164 *ppos += len;
165
166 return copy_to_user(result, buffer, len) ? -EFAULT : 0;
167}
168
169static int do_hardware_dma (ctl_table *table, int write,
170 struct file *filp, void __user *result,
171 size_t *lenp, loff_t *ppos)
172{
173 struct parport *port = (struct parport *)table->extra1;
174 char buffer[20];
175 int len = 0;
176
177 if (*ppos) {
178 *lenp = 0;
179 return 0;
180 }
181
182 if (write) /* permissions prevent this anyway */
183 return -EACCES;
184
185 len += sprintf (buffer, "%d\n", port->dma);
186
187 if (len > *lenp)
188 len = *lenp;
189 else
190 *lenp = len;
191
192 *ppos += len;
193
194 return copy_to_user(result, buffer, len) ? -EFAULT : 0;
195}
196
197static int do_hardware_modes (ctl_table *table, int write,
198 struct file *filp, void __user *result,
199 size_t *lenp, loff_t *ppos)
200{
201 struct parport *port = (struct parport *)table->extra1;
202 char buffer[40];
203 int len = 0;
204
205 if (*ppos) {
206 *lenp = 0;
207 return 0;
208 }
209
210 if (write) /* permissions prevent this anyway */
211 return -EACCES;
212
213 {
214#define printmode(x) {if(port->modes&PARPORT_MODE_##x){len+=sprintf(buffer+len,"%s%s",f?",":"",#x);f++;}}
215 int f = 0;
216 printmode(PCSPP);
217 printmode(TRISTATE);
218 printmode(COMPAT);
219 printmode(EPP);
220 printmode(ECP);
221 printmode(DMA);
222#undef printmode
223 }
224 buffer[len++] = '\n';
225
226 if (len > *lenp)
227 len = *lenp;
228 else
229 *lenp = len;
230
231 *ppos += len;
232
233 return copy_to_user(result, buffer, len) ? -EFAULT : 0;
234}
235
Eric W. Biederman2564b7b2007-02-14 00:33:54 -0800236#define PARPORT_PORT_DIR(CHILD) { .ctl_name = 0, .procname = NULL, .mode = 0555, .child = CHILD }
237#define PARPORT_PARPORT_DIR(CHILD) { .ctl_name = DEV_PARPORT, .procname = "parport", \
238 .mode = 0555, .child = CHILD }
239#define PARPORT_DEV_DIR(CHILD) { .ctl_name = CTL_DEV, .procname = "dev", .mode = 0555, .child = CHILD }
Eric W. Biederman25398a12007-10-18 03:05:30 -0700240#define PARPORT_DEVICES_ROOT_DIR { .procname = "devices", \
Eric W. Biederman2564b7b2007-02-14 00:33:54 -0800241 .mode = 0555, .child = NULL }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242
243static const unsigned long parport_min_timeslice_value =
244PARPORT_MIN_TIMESLICE_VALUE;
245
246static const unsigned long parport_max_timeslice_value =
247PARPORT_MAX_TIMESLICE_VALUE;
248
249static const int parport_min_spintime_value =
250PARPORT_MIN_SPINTIME_VALUE;
251
252static const int parport_max_spintime_value =
253PARPORT_MAX_SPINTIME_VALUE;
254
255
256struct parport_sysctl_table {
257 struct ctl_table_header *sysctl_header;
258 ctl_table vars[12];
259 ctl_table device_dir[2];
260 ctl_table port_dir[2];
261 ctl_table parport_dir[2];
262 ctl_table dev_dir[2];
263};
264
265static const struct parport_sysctl_table parport_sysctl_template = {
Eric W. Biederman2564b7b2007-02-14 00:33:54 -0800266 .sysctl_header = NULL,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 {
Eric W. Biederman2564b7b2007-02-14 00:33:54 -0800268 {
Eric W. Biederman2564b7b2007-02-14 00:33:54 -0800269 .procname = "spintime",
270 .data = NULL,
271 .maxlen = sizeof(int),
272 .mode = 0644,
273 .proc_handler = &proc_dointvec_minmax,
274 .extra1 = (void*) &parport_min_spintime_value,
275 .extra2 = (void*) &parport_max_spintime_value
276 },
277 {
Eric W. Biederman2564b7b2007-02-14 00:33:54 -0800278 .procname = "base-addr",
279 .data = NULL,
280 .maxlen = 0,
281 .mode = 0444,
282 .proc_handler = &do_hardware_base_addr
283 },
284 {
Eric W. Biederman2564b7b2007-02-14 00:33:54 -0800285 .procname = "irq",
286 .data = NULL,
287 .maxlen = 0,
288 .mode = 0444,
289 .proc_handler = &do_hardware_irq
290 },
291 {
Eric W. Biederman2564b7b2007-02-14 00:33:54 -0800292 .procname = "dma",
293 .data = NULL,
294 .maxlen = 0,
295 .mode = 0444,
296 .proc_handler = &do_hardware_dma
297 },
298 {
Eric W. Biederman2564b7b2007-02-14 00:33:54 -0800299 .procname = "modes",
300 .data = NULL,
301 .maxlen = 0,
302 .mode = 0444,
303 .proc_handler = &do_hardware_modes
304 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305 PARPORT_DEVICES_ROOT_DIR,
306#ifdef CONFIG_PARPORT_1284
Eric W. Biederman2564b7b2007-02-14 00:33:54 -0800307 {
Eric W. Biederman2564b7b2007-02-14 00:33:54 -0800308 .procname = "autoprobe",
309 .data = NULL,
310 .maxlen = 0,
311 .mode = 0444,
312 .proc_handler = &do_autoprobe
313 },
314 {
Eric W. Biederman2564b7b2007-02-14 00:33:54 -0800315 .procname = "autoprobe0",
316 .data = NULL,
317 .maxlen = 0,
318 .mode = 0444,
319 .proc_handler = &do_autoprobe
320 },
321 {
Eric W. Biederman2564b7b2007-02-14 00:33:54 -0800322 .procname = "autoprobe1",
323 .data = NULL,
324 .maxlen = 0,
325 .mode = 0444,
326 .proc_handler = &do_autoprobe
327 },
328 {
Eric W. Biederman2564b7b2007-02-14 00:33:54 -0800329 .procname = "autoprobe2",
330 .data = NULL,
331 .maxlen = 0,
332 .mode = 0444,
333 .proc_handler = &do_autoprobe
334 },
335 {
Eric W. Biederman2564b7b2007-02-14 00:33:54 -0800336 .procname = "autoprobe3",
337 .data = NULL,
338 .maxlen = 0,
339 .mode = 0444,
340 .proc_handler = &do_autoprobe
341 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342#endif /* IEEE 1284 support */
Eric W. Biederman2564b7b2007-02-14 00:33:54 -0800343 {}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344 },
Eric W. Biederman2564b7b2007-02-14 00:33:54 -0800345 {
346 {
Eric W. Biederman2564b7b2007-02-14 00:33:54 -0800347 .procname = "active",
348 .data = NULL,
349 .maxlen = 0,
350 .mode = 0444,
351 .proc_handler = &do_active_device
352 },
353 {}
354 },
355 {
356 PARPORT_PORT_DIR(NULL),
357 {}
358 },
359 {
360 PARPORT_PARPORT_DIR(NULL),
361 {}
362 },
363 {
364 PARPORT_DEV_DIR(NULL),
365 {}
366 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367};
368
369struct parport_device_sysctl_table
370{
371 struct ctl_table_header *sysctl_header;
372 ctl_table vars[2];
373 ctl_table device_dir[2];
374 ctl_table devices_root_dir[2];
375 ctl_table port_dir[2];
376 ctl_table parport_dir[2];
377 ctl_table dev_dir[2];
378};
379
380static const struct parport_device_sysctl_table
381parport_device_sysctl_template = {
Eric W. Biederman2564b7b2007-02-14 00:33:54 -0800382 .sysctl_header = NULL,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383 {
Eric W. Biederman2564b7b2007-02-14 00:33:54 -0800384 {
Eric W. Biederman2564b7b2007-02-14 00:33:54 -0800385 .procname = "timeslice",
386 .data = NULL,
Eric Dumazet60af8802007-12-17 16:19:51 -0800387 .maxlen = sizeof(unsigned long),
Eric W. Biederman2564b7b2007-02-14 00:33:54 -0800388 .mode = 0644,
389 .proc_handler = &proc_doulongvec_ms_jiffies_minmax,
390 .extra1 = (void*) &parport_min_timeslice_value,
391 .extra2 = (void*) &parport_max_timeslice_value
392 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393 },
Eric W. Biederman2564b7b2007-02-14 00:33:54 -0800394 {
395 {
396 .ctl_name = 0,
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 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421};
422
423struct parport_default_sysctl_table
424{
425 struct ctl_table_header *sysctl_header;
426 ctl_table vars[3];
427 ctl_table default_dir[2];
428 ctl_table parport_dir[2];
429 ctl_table dev_dir[2];
430};
431
432extern unsigned long parport_default_timeslice;
433extern int parport_default_spintime;
434
435static struct parport_default_sysctl_table
436parport_default_sysctl_table = {
Eric W. Biederman2564b7b2007-02-14 00:33:54 -0800437 .sysctl_header = NULL,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438 {
Eric W. Biederman2564b7b2007-02-14 00:33:54 -0800439 {
Eric W. Biederman2564b7b2007-02-14 00:33:54 -0800440 .procname = "timeslice",
441 .data = &parport_default_timeslice,
442 .maxlen = sizeof(parport_default_timeslice),
443 .mode = 0644,
444 .proc_handler = &proc_doulongvec_ms_jiffies_minmax,
445 .extra1 = (void*) &parport_min_timeslice_value,
446 .extra2 = (void*) &parport_max_timeslice_value
447 },
448 {
Eric W. Biederman2564b7b2007-02-14 00:33:54 -0800449 .procname = "spintime",
450 .data = &parport_default_spintime,
451 .maxlen = sizeof(parport_default_spintime),
452 .mode = 0644,
453 .proc_handler = &proc_dointvec_minmax,
454 .extra1 = (void*) &parport_min_spintime_value,
455 .extra2 = (void*) &parport_max_spintime_value
456 },
457 {}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459 {
Eric W. Biederman2564b7b2007-02-14 00:33:54 -0800460 {
461 .ctl_name = DEV_PARPORT_DEFAULT,
462 .procname = "default",
463 .mode = 0555,
464 .child = parport_default_sysctl_table.vars
465 },
466 {}
467 },
468 {
469 PARPORT_PARPORT_DIR(parport_default_sysctl_table.default_dir),
470 {}
471 },
472 {
473 PARPORT_DEV_DIR(parport_default_sysctl_table.parport_dir),
474 {}
475 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476};
477
478
479int parport_proc_register(struct parport *port)
480{
481 struct parport_sysctl_table *t;
482 int i;
483
484 t = kmalloc(sizeof(*t), GFP_KERNEL);
485 if (t == NULL)
486 return -ENOMEM;
487 memcpy(t, &parport_sysctl_template, sizeof(*t));
488
489 t->device_dir[0].extra1 = port;
490
Eric W. Biederman25398a12007-10-18 03:05:30 -0700491 for (i = 0; i < 5; i++)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 t->vars[i].extra1 = port;
493
494 t->vars[0].data = &port->spintime;
495 t->vars[5].child = t->device_dir;
496
497 for (i = 0; i < 5; i++)
498 t->vars[6 + i].extra2 = &port->probe_info[i];
499
500 t->port_dir[0].procname = port->name;
Eric W. Biederman25398a12007-10-18 03:05:30 -0700501 t->port_dir[0].ctl_name = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502
503 t->port_dir[0].child = t->vars;
504 t->parport_dir[0].child = t->port_dir;
505 t->dev_dir[0].child = t->parport_dir;
506
Eric W. Biederman0b4d4142007-02-14 00:34:09 -0800507 t->sysctl_header = register_sysctl_table(t->dev_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508 if (t->sysctl_header == NULL) {
509 kfree(t);
510 t = NULL;
511 }
512 port->sysctl_table = t;
513 return 0;
514}
515
516int parport_proc_unregister(struct parport *port)
517{
518 if (port->sysctl_table) {
519 struct parport_sysctl_table *t = port->sysctl_table;
520 port->sysctl_table = NULL;
521 unregister_sysctl_table(t->sysctl_header);
522 kfree(t);
523 }
524 return 0;
525}
526
527int parport_device_proc_register(struct pardevice *device)
528{
529 struct parport_device_sysctl_table *t;
530 struct parport * port = device->port;
531
532 t = kmalloc(sizeof(*t), GFP_KERNEL);
533 if (t == NULL)
534 return -ENOMEM;
535 memcpy(t, &parport_device_sysctl_template, sizeof(*t));
536
537 t->dev_dir[0].child = t->parport_dir;
538 t->parport_dir[0].child = t->port_dir;
539 t->port_dir[0].procname = port->name;
Eric W. Biederman25398a12007-10-18 03:05:30 -0700540 t->port_dir[0].ctl_name = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700541 t->port_dir[0].child = t->devices_root_dir;
542 t->devices_root_dir[0].child = t->device_dir;
543
Eric W. Biederman25398a12007-10-18 03:05:30 -0700544 t->device_dir[0].ctl_name = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545 t->device_dir[0].procname = device->name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546 t->device_dir[0].child = t->vars;
547 t->vars[0].data = &device->timeslice;
548
Eric W. Biederman0b4d4142007-02-14 00:34:09 -0800549 t->sysctl_header = register_sysctl_table(t->dev_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550 if (t->sysctl_header == NULL) {
551 kfree(t);
552 t = NULL;
553 }
554 device->sysctl_table = t;
555 return 0;
556}
557
558int parport_device_proc_unregister(struct pardevice *device)
559{
560 if (device->sysctl_table) {
561 struct parport_device_sysctl_table *t = device->sysctl_table;
562 device->sysctl_table = NULL;
563 unregister_sysctl_table(t->sysctl_header);
564 kfree(t);
565 }
566 return 0;
567}
568
569static int __init parport_default_proc_register(void)
570{
571 parport_default_sysctl_table.sysctl_header =
Eric W. Biederman0b4d4142007-02-14 00:34:09 -0800572 register_sysctl_table(parport_default_sysctl_table.dev_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573 return 0;
574}
575
576static void __exit parport_default_proc_unregister(void)
577{
578 if (parport_default_sysctl_table.sysctl_header) {
579 unregister_sysctl_table(parport_default_sysctl_table.
580 sysctl_header);
581 parport_default_sysctl_table.sysctl_header = NULL;
582 }
583}
584
585#else /* no sysctl or no procfs*/
586
587int parport_proc_register(struct parport *pp)
588{
589 return 0;
590}
591
592int parport_proc_unregister(struct parport *pp)
593{
594 return 0;
595}
596
597int parport_device_proc_register(struct pardevice *device)
598{
599 return 0;
600}
601
602int parport_device_proc_unregister(struct pardevice *device)
603{
604 return 0;
605}
606
607static int __init parport_default_proc_register (void)
608{
609 return 0;
610}
611
612static void __exit parport_default_proc_unregister (void)
613{
614}
615#endif
616
617module_init(parport_default_proc_register)
618module_exit(parport_default_proc_unregister)