[PATCH] softmac: Channel is listed twice in scan output
[linux-2.6] / drivers / parport / procfs.c
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)