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epca.c: reformat comments and coding style improvements
[linux-2.6/openmoko-kernel.git] / drivers / parport / procfs.c
blobbdbdab9285cacfbb6839c24cbbf9f11239e5796f
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
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
34 static 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
71 static 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
113 static 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
141 static 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
169 static 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
197 static 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
236 #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 }
240 #define PARPORT_DEVICES_ROOT_DIR { .ctl_name = DEV_PARPORT_DEVICES, .procname = "devices", \
241 .mode = 0555, .child = NULL }
242
243 static const unsigned long parport_min_timeslice_value =
244 PARPORT_MIN_TIMESLICE_VALUE;
245
246 static const unsigned long parport_max_timeslice_value =
247 PARPORT_MAX_TIMESLICE_VALUE;
248
249 static const int parport_min_spintime_value =
250 PARPORT_MIN_SPINTIME_VALUE;
251
252 static const int parport_max_spintime_value =
253 PARPORT_MAX_SPINTIME_VALUE;
254
255
256 struct 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
265 static const struct parport_sysctl_table parport_sysctl_template = {
266 .sysctl_header = NULL,
267 {
268 {
269 .ctl_name = DEV_PARPORT_SPINTIME,
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 .ctl_name = DEV_PARPORT_BASE_ADDR,
280 .procname = "base-addr",
281 .data = NULL,
282 .maxlen = 0,
283 .mode = 0444,
284 .proc_handler = &do_hardware_base_addr
285 },
286 {
287 .ctl_name = DEV_PARPORT_IRQ,
288 .procname = "irq",
289 .data = NULL,
290 .maxlen = 0,
291 .mode = 0444,
292 .proc_handler = &do_hardware_irq
293 },
294 {
295 .ctl_name = DEV_PARPORT_DMA,
296 .procname = "dma",
297 .data = NULL,
298 .maxlen = 0,
299 .mode = 0444,
300 .proc_handler = &do_hardware_dma
301 },
302 {
303 .ctl_name = DEV_PARPORT_MODES,
304 .procname = "modes",
305 .data = NULL,
306 .maxlen = 0,
307 .mode = 0444,
308 .proc_handler = &do_hardware_modes
309 },
310 PARPORT_DEVICES_ROOT_DIR,
311 #ifdef CONFIG_PARPORT_1284
312 {
313 .ctl_name = DEV_PARPORT_AUTOPROBE,
314 .procname = "autoprobe",
315 .data = NULL,
316 .maxlen = 0,
317 .mode = 0444,
318 .proc_handler = &do_autoprobe
319 },
320 {
321 .ctl_name = DEV_PARPORT_AUTOPROBE + 1,
322 .procname = "autoprobe0",
323 .data = NULL,
324 .maxlen = 0,
325 .mode = 0444,
326 .proc_handler = &do_autoprobe
327 },
328 {
329 .ctl_name = DEV_PARPORT_AUTOPROBE + 2,
330 .procname = "autoprobe1",
331 .data = NULL,
332 .maxlen = 0,
333 .mode = 0444,
334 .proc_handler = &do_autoprobe
335 },
336 {
337 .ctl_name = DEV_PARPORT_AUTOPROBE + 3,
338 .procname = "autoprobe2",
339 .data = NULL,
340 .maxlen = 0,
341 .mode = 0444,
342 .proc_handler = &do_autoprobe
343 },
344 {
345 .ctl_name = DEV_PARPORT_AUTOPROBE + 4,
346 .procname = "autoprobe3",
347 .data = NULL,
348 .maxlen = 0,
349 .mode = 0444,
350 .proc_handler = &do_autoprobe
351 },
352 #endif /* IEEE 1284 support */
353 {}
354 },
355 {
356 {
357 .ctl_name = DEV_PARPORT_DEVICES_ACTIVE,
358 .procname = "active",
359 .data = NULL,
360 .maxlen = 0,
361 .mode = 0444,
362 .proc_handler = &do_active_device
363 },
364 {}
365 },
366 {
367 PARPORT_PORT_DIR(NULL),
368 {}
369 },
370 {
371 PARPORT_PARPORT_DIR(NULL),
372 {}
373 },
374 {
375 PARPORT_DEV_DIR(NULL),
376 {}
377 }
378 };
379
380 struct parport_device_sysctl_table
381 {
382 struct ctl_table_header *sysctl_header;
383 ctl_table vars[2];
384 ctl_table device_dir[2];
385 ctl_table devices_root_dir[2];
386 ctl_table port_dir[2];
387 ctl_table parport_dir[2];
388 ctl_table dev_dir[2];
389 };
390
391 static const struct parport_device_sysctl_table
392 parport_device_sysctl_template = {
393 .sysctl_header = NULL,
394 {
395 {
396 .ctl_name = DEV_PARPORT_DEVICE_TIMESLICE,
397 .procname = "timeslice",
398 .data = NULL,
399 .maxlen = sizeof(int),
400 .mode = 0644,
401 .proc_handler = &proc_doulongvec_ms_jiffies_minmax,
402 .extra1 = (void*) &parport_min_timeslice_value,
403 .extra2 = (void*) &parport_max_timeslice_value
404 },
405 },
406 {
407 {
408 .ctl_name = 0,
409 .procname = NULL,
410 .data = NULL,
411 .maxlen = 0,
412 .mode = 0555,
413 .child = NULL
414 },
415 {}
416 },
417 {
418 PARPORT_DEVICES_ROOT_DIR,
419 {}
420 },
421 {
422 PARPORT_PORT_DIR(NULL),
423 {}
424 },
425 {
426 PARPORT_PARPORT_DIR(NULL),
427 {}
428 },
429 {
430 PARPORT_DEV_DIR(NULL),
431 {}
432 }
433 };
434
435 struct parport_default_sysctl_table
436 {
437 struct ctl_table_header *sysctl_header;
438 ctl_table vars[3];
439 ctl_table default_dir[2];
440 ctl_table parport_dir[2];
441 ctl_table dev_dir[2];
442 };
443
444 extern unsigned long parport_default_timeslice;
445 extern int parport_default_spintime;
446
447 static struct parport_default_sysctl_table
448 parport_default_sysctl_table = {
449 .sysctl_header = NULL,
450 {
451 {
452 .ctl_name = DEV_PARPORT_DEFAULT_TIMESLICE,
453 .procname = "timeslice",
454 .data = &parport_default_timeslice,
455 .maxlen = sizeof(parport_default_timeslice),
456 .mode = 0644,
457 .proc_handler = &proc_doulongvec_ms_jiffies_minmax,
458 .extra1 = (void*) &parport_min_timeslice_value,
459 .extra2 = (void*) &parport_max_timeslice_value
460 },
461 {
462 .ctl_name = DEV_PARPORT_DEFAULT_SPINTIME,
463 .procname = "spintime",
464 .data = &parport_default_spintime,
465 .maxlen = sizeof(parport_default_spintime),
466 .mode = 0644,
467 .proc_handler = &proc_dointvec_minmax,
468 .extra1 = (void*) &parport_min_spintime_value,
469 .extra2 = (void*) &parport_max_spintime_value
470 },
471 {}
472 },
473 {
474 {
475 .ctl_name = DEV_PARPORT_DEFAULT,
476 .procname = "default",
477 .mode = 0555,
478 .child = parport_default_sysctl_table.vars
479 },
480 {}
481 },
482 {
483 PARPORT_PARPORT_DIR(parport_default_sysctl_table.default_dir),
484 {}
485 },
486 {
487 PARPORT_DEV_DIR(parport_default_sysctl_table.parport_dir),
488 {}
489 }
490 };
491
492
493 int parport_proc_register(struct parport *port)
494 {
495 struct parport_sysctl_table *t;
496 int i;
497
498 t = kmalloc(sizeof(*t), GFP_KERNEL);
499 if (t == NULL)
500 return -ENOMEM;
501 memcpy(t, &parport_sysctl_template, sizeof(*t));
502
503 t->device_dir[0].extra1 = port;
504
505 for (i = 0; i < 8; i++)
506 t->vars[i].extra1 = port;
507
508 t->vars[0].data = &port->spintime;
509 t->vars[5].child = t->device_dir;
510
511 for (i = 0; i < 5; i++)
512 t->vars[6 + i].extra2 = &port->probe_info[i];
513
514 t->port_dir[0].procname = port->name;
515 t->port_dir[0].ctl_name = port->number + 1; /* nb 0 isn't legal here */
516
517 t->port_dir[0].child = t->vars;
518 t->parport_dir[0].child = t->port_dir;
519 t->dev_dir[0].child = t->parport_dir;
520
521 t->sysctl_header = register_sysctl_table(t->dev_dir);
522 if (t->sysctl_header == NULL) {
523 kfree(t);
524 t = NULL;
525 }
526 port->sysctl_table = t;
527 return 0;
528 }
529
530 int parport_proc_unregister(struct parport *port)
531 {
532 if (port->sysctl_table) {
533 struct parport_sysctl_table *t = port->sysctl_table;
534 port->sysctl_table = NULL;
535 unregister_sysctl_table(t->sysctl_header);
536 kfree(t);
537 }
538 return 0;
539 }
540
541 int parport_device_proc_register(struct pardevice *device)
542 {
543 struct parport_device_sysctl_table *t;
544 struct parport * port = device->port;
545
546 t = kmalloc(sizeof(*t), GFP_KERNEL);
547 if (t == NULL)
548 return -ENOMEM;
549 memcpy(t, &parport_device_sysctl_template, sizeof(*t));
550
551 t->dev_dir[0].child = t->parport_dir;
552 t->parport_dir[0].child = t->port_dir;
553 t->port_dir[0].procname = port->name;
554 t->port_dir[0].ctl_name = port->number + 1; /* nb 0 isn't legal here */
555 t->port_dir[0].child = t->devices_root_dir;
556 t->devices_root_dir[0].child = t->device_dir;
557
558 #ifdef CONFIG_PARPORT_1284
559
560 t->device_dir[0].ctl_name =
561 parport_device_num(port->number, port->muxport,
562 device->daisy)
563 + 1; /* nb 0 isn't legal here */
564
565 #else /* No IEEE 1284 support */
566
567 /* parport_device_num isn't available. */
568 t->device_dir[0].ctl_name = 1;
569
570 #endif /* IEEE 1284 support or not */
571
572 t->device_dir[0].procname = device->name;
573 t->device_dir[0].extra1 = device;
574 t->device_dir[0].child = t->vars;
575 t->vars[0].data = &device->timeslice;
576
577 t->sysctl_header = register_sysctl_table(t->dev_dir);
578 if (t->sysctl_header == NULL) {
579 kfree(t);
580 t = NULL;
581 }
582 device->sysctl_table = t;
583 return 0;
584 }
585
586 int parport_device_proc_unregister(struct pardevice *device)
587 {
588 if (device->sysctl_table) {
589 struct parport_device_sysctl_table *t = device->sysctl_table;
590 device->sysctl_table = NULL;
591 unregister_sysctl_table(t->sysctl_header);
592 kfree(t);
593 }
594 return 0;
595 }
596
597 static int __init parport_default_proc_register(void)
598 {
599 parport_default_sysctl_table.sysctl_header =
600 register_sysctl_table(parport_default_sysctl_table.dev_dir);
601 return 0;
602 }
603
604 static void __exit parport_default_proc_unregister(void)
605 {
606 if (parport_default_sysctl_table.sysctl_header) {
607 unregister_sysctl_table(parport_default_sysctl_table.
608 sysctl_header);
609 parport_default_sysctl_table.sysctl_header = NULL;
610 }
611 }
612
613 #else /* no sysctl or no procfs*/
614
615 int parport_proc_register(struct parport *pp)
616 {
617 return 0;
618 }
619
620 int parport_proc_unregister(struct parport *pp)
621 {
622 return 0;
623 }
624
625 int parport_device_proc_register(struct pardevice *device)
626 {
627 return 0;
628 }
629
630 int parport_device_proc_unregister(struct pardevice *device)
631 {
632 return 0;
633 }
634
635 static int __init parport_default_proc_register (void)
636 {
637 return 0;
638 }
639
640 static void __exit parport_default_proc_unregister (void)
641 {
642 }
643 #endif
644
645 module_init(parport_default_proc_register)
646 module_exit(parport_default_proc_unregister)
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