File: /usr/src/linux/drivers/parport/procfs.c
1 /* Sysctl interface for parport devices.
2 *
3 * Authors: David Campbell <campbell@torque.net>
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/config.h>
17 #include <linux/errno.h>
18 #include <linux/kernel.h>
19 #include <linux/slab.h>
20 #include <linux/parport.h>
21 #include <linux/ctype.h>
22 #include <linux/sysctl.h>
23
24 #include <asm/uaccess.h>
25
26 #if defined(CONFIG_SYSCTL) && defined(CONFIG_PROC_FS)
27
28 #define PARPORT_MIN_TIMESLICE_VALUE 1ul
29 #define PARPORT_MAX_TIMESLICE_VALUE ((unsigned long) HZ)
30 #define PARPORT_MIN_SPINTIME_VALUE 1
31 #define PARPORT_MAX_SPINTIME_VALUE 1000
32
33 static int do_active_device(ctl_table *table, int write, struct file *filp,
34 void *result, size_t *lenp)
35 {
36 struct parport *port = (struct parport *)table->extra1;
37 char buffer[256];
38 struct pardevice *dev;
39 int len = 0;
40
41 if (write) /* can't happen anyway */
42 return -EACCES;
43
44 if (filp->f_pos) {
45 *lenp = 0;
46 return 0;
47 }
48
49 for (dev = port->devices; dev ; dev = dev->next) {
50 if(dev == port->cad) {
51 len += sprintf(buffer, "%s\n", dev->name);
52 }
53 }
54
55 if(!len) {
56 len += sprintf(buffer, "%s\n", "none");
57 }
58
59 if (len > *lenp)
60 len = *lenp;
61 else
62 *lenp = len;
63
64 filp->f_pos += len;
65
66 return copy_to_user(result, buffer, len) ? -EFAULT : 0;
67 }
68
69 #ifdef CONFIG_PARPORT_1284
70 static int do_autoprobe(ctl_table *table, int write, struct file *filp,
71 void *result, size_t *lenp)
72 {
73 struct parport_device_info *info = table->extra2;
74 const char *str;
75 char buffer[256];
76 int len = 0;
77
78 if (write) /* permissions stop this */
79 return -EACCES;
80
81 if (filp->f_pos) {
82 *lenp = 0;
83 return 0;
84 }
85
86 if ((str = info->class_name) != NULL)
87 len += sprintf (buffer + len, "CLASS:%s;\n", str);
88
89 if ((str = info->model) != NULL)
90 len += sprintf (buffer + len, "MODEL:%s;\n", str);
91
92 if ((str = info->mfr) != NULL)
93 len += sprintf (buffer + len, "MANUFACTURER:%s;\n", str);
94
95 if ((str = info->description) != NULL)
96 len += sprintf (buffer + len, "DESCRIPTION:%s;\n", str);
97
98 if ((str = info->cmdset) != NULL)
99 len += sprintf (buffer + len, "COMMAND SET:%s;\n", str);
100
101 if (len > *lenp)
102 len = *lenp;
103 else
104 *lenp = len;
105
106 filp->f_pos += len;
107
108 return copy_to_user (result, buffer, len) ? -EFAULT : 0;
109 }
110 #endif /* IEEE1284.3 support. */
111
112 static int do_hardware_base_addr (ctl_table *table, int write,
113 struct file *filp, void *result,
114 size_t *lenp)
115 {
116 struct parport *port = (struct parport *)table->extra1;
117 char buffer[20];
118 int len = 0;
119
120 if (filp->f_pos) {
121 *lenp = 0;
122 return 0;
123 }
124
125 if (write) /* permissions prevent this anyway */
126 return -EACCES;
127
128 len += sprintf (buffer, "%lu\t%lu\n", port->base, port->base_hi);
129
130 if (len > *lenp)
131 len = *lenp;
132 else
133 *lenp = len;
134
135 filp->f_pos += len;
136
137 return copy_to_user(result, buffer, len) ? -EFAULT : 0;
138 }
139
140 static int do_hardware_irq (ctl_table *table, int write,
141 struct file *filp, void *result,
142 size_t *lenp)
143 {
144 struct parport *port = (struct parport *)table->extra1;
145 char buffer[20];
146 int len = 0;
147
148 if (filp->f_pos) {
149 *lenp = 0;
150 return 0;
151 }
152
153 if (write) /* permissions prevent this anyway */
154 return -EACCES;
155
156 len += sprintf (buffer, "%d\n", port->irq);
157
158 if (len > *lenp)
159 len = *lenp;
160 else
161 *lenp = len;
162
163 filp->f_pos += len;
164
165 return copy_to_user(result, buffer, len) ? -EFAULT : 0;
166 }
167
168 static int do_hardware_dma (ctl_table *table, int write,
169 struct file *filp, void *result,
170 size_t *lenp)
171 {
172 struct parport *port = (struct parport *)table->extra1;
173 char buffer[20];
174 int len = 0;
175
176 if (filp->f_pos) {
177 *lenp = 0;
178 return 0;
179 }
180
181 if (write) /* permissions prevent this anyway */
182 return -EACCES;
183
184 len += sprintf (buffer, "%d\n", port->dma);
185
186 if (len > *lenp)
187 len = *lenp;
188 else
189 *lenp = len;
190
191 filp->f_pos += len;
192
193 return copy_to_user(result, buffer, len) ? -EFAULT : 0;
194 }
195
196 static int do_hardware_modes (ctl_table *table, int write,
197 struct file *filp, void *result,
198 size_t *lenp)
199 {
200 struct parport *port = (struct parport *)table->extra1;
201 char buffer[40];
202 int len = 0;
203
204 if (filp->f_pos) {
205 *lenp = 0;
206 return 0;
207 }
208
209 if (write) /* permissions prevent this anyway */
210 return -EACCES;
211
212 {
213 #define printmode(x) {if(port->modes&PARPORT_MODE_##x){len+=sprintf(buffer+len,"%s%s",f?",":"",#x);f++;}}
214 int f = 0;
215 printmode(PCSPP);
216 printmode(TRISTATE);
217 printmode(COMPAT);
218 printmode(EPP);
219 printmode(ECP);
220 printmode(DMA);
221 #undef printmode
222 }
223 buffer[len++] = '\n';
224
225 if (len > *lenp)
226 len = *lenp;
227 else
228 *lenp = len;
229
230 filp->f_pos += len;
231
232 return copy_to_user(result, buffer, len) ? -EFAULT : 0;
233 }
234
235 #define PARPORT_PORT_DIR(child) { 0, NULL, NULL, 0, 0555, child }
236 #define PARPORT_PARPORT_DIR(child) { DEV_PARPORT, "parport", \
237 NULL, 0, 0555, child }
238 #define PARPORT_DEV_DIR(child) { CTL_DEV, "dev", NULL, 0, 0555, child }
239 #define PARPORT_DEVICES_ROOT_DIR { DEV_PARPORT_DEVICES, "devices", \
240 NULL, 0, 0555, NULL }
241
242 static const unsigned long parport_min_timeslice_value =
243 PARPORT_MIN_TIMESLICE_VALUE;
244
245 static const unsigned long parport_max_timeslice_value =
246 PARPORT_MAX_TIMESLICE_VALUE;
247
248 static const int parport_min_spintime_value =
249 PARPORT_MIN_SPINTIME_VALUE;
250
251 static const int parport_max_spintime_value =
252 PARPORT_MAX_SPINTIME_VALUE;
253
254
255 struct parport_sysctl_table {
256 struct ctl_table_header *sysctl_header;
257 ctl_table vars[12];
258 ctl_table device_dir[2];
259 ctl_table port_dir[2];
260 ctl_table parport_dir[2];
261 ctl_table dev_dir[2];
262 };
263
264 static const struct parport_sysctl_table parport_sysctl_template = {
265 NULL,
266 {
267 { DEV_PARPORT_SPINTIME, "spintime",
268 NULL, sizeof(int), 0644, NULL,
269 &proc_dointvec_minmax, NULL, NULL,
270 (void*) &parport_min_spintime_value,
271 (void*) &parport_max_spintime_value },
272 { DEV_PARPORT_BASE_ADDR, "base-addr",
273 NULL, 0, 0444, NULL,
274 &do_hardware_base_addr },
275 { DEV_PARPORT_IRQ, "irq",
276 NULL, 0, 0444, NULL,
277 &do_hardware_irq },
278 { DEV_PARPORT_DMA, "dma",
279 NULL, 0, 0444, NULL,
280 &do_hardware_dma },
281 { DEV_PARPORT_MODES, "modes",
282 NULL, 0, 0444, NULL,
283 &do_hardware_modes },
284 PARPORT_DEVICES_ROOT_DIR,
285 #ifdef CONFIG_PARPORT_1284
286 { DEV_PARPORT_AUTOPROBE, "autoprobe",
287 NULL, 0, 0444, NULL,
288 &do_autoprobe },
289 { DEV_PARPORT_AUTOPROBE + 1, "autoprobe0",
290 NULL, 0, 0444, NULL,
291 &do_autoprobe },
292 { DEV_PARPORT_AUTOPROBE + 2, "autoprobe1",
293 NULL, 0, 0444, NULL,
294 &do_autoprobe },
295 { DEV_PARPORT_AUTOPROBE + 3, "autoprobe2",
296 NULL, 0, 0444, NULL,
297 &do_autoprobe },
298 { DEV_PARPORT_AUTOPROBE + 4, "autoprobe3",
299 NULL, 0, 0444, NULL,
300 &do_autoprobe },
301 #endif /* IEEE 1284 support */
302 {0}
303 },
304 { {DEV_PARPORT_DEVICES_ACTIVE, "active", NULL, 0, 0444, NULL,
305 &do_active_device }, {0}},
306 { PARPORT_PORT_DIR(NULL), {0}},
307 { PARPORT_PARPORT_DIR(NULL), {0}},
308 { PARPORT_DEV_DIR(NULL), {0}}
309 };
310
311 struct parport_device_sysctl_table
312 {
313 struct ctl_table_header *sysctl_header;
314 ctl_table vars[2];
315 ctl_table device_dir[2];
316 ctl_table devices_root_dir[2];
317 ctl_table port_dir[2];
318 ctl_table parport_dir[2];
319 ctl_table dev_dir[2];
320 };
321
322 static const struct parport_device_sysctl_table
323 parport_device_sysctl_template = {
324 NULL,
325 {
326 { DEV_PARPORT_DEVICE_TIMESLICE, "timeslice",
327 NULL, sizeof(int), 0644, NULL,
328 &proc_doulongvec_ms_jiffies_minmax, NULL, NULL,
329 (void*) &parport_min_timeslice_value,
330 (void*) &parport_max_timeslice_value },
331 },
332 { {0, NULL, NULL, 0, 0555, NULL}, {0}},
333 { PARPORT_DEVICES_ROOT_DIR, {0}},
334 { PARPORT_PORT_DIR(NULL), {0}},
335 { PARPORT_PARPORT_DIR(NULL), {0}},
336 { PARPORT_DEV_DIR(NULL), {0}}
337 };
338
339 struct parport_default_sysctl_table
340 {
341 struct ctl_table_header *sysctl_header;
342 ctl_table vars[3];
343 ctl_table default_dir[2];
344 ctl_table parport_dir[2];
345 ctl_table dev_dir[2];
346 };
347
348 extern unsigned long parport_default_timeslice;
349 extern int parport_default_spintime;
350
351 static struct parport_default_sysctl_table
352 parport_default_sysctl_table = {
353 NULL,
354 {
355 { DEV_PARPORT_DEFAULT_TIMESLICE, "timeslice",
356 &parport_default_timeslice,
357 sizeof(parport_default_timeslice), 0644, NULL,
358 &proc_doulongvec_ms_jiffies_minmax, NULL, NULL,
359 (void*) &parport_min_timeslice_value,
360 (void*) &parport_max_timeslice_value },
361 { DEV_PARPORT_DEFAULT_SPINTIME, "spintime",
362 &parport_default_spintime,
363 sizeof(parport_default_spintime), 0644, NULL,
364 &proc_dointvec_minmax, NULL, NULL,
365 (void*) &parport_min_spintime_value,
366 (void*) &parport_max_spintime_value },
367 {0}
368 },
369 { { DEV_PARPORT_DEFAULT, "default", NULL, 0, 0555,
370 parport_default_sysctl_table.vars },{0}},
371 {
372 PARPORT_PARPORT_DIR(parport_default_sysctl_table.default_dir),
373 {0}},
374 { PARPORT_DEV_DIR(parport_default_sysctl_table.parport_dir), {0}}
375 };
376
377
378 int parport_proc_register(struct parport *port)
379 {
380 struct parport_sysctl_table *t;
381 int i;
382
383 t = kmalloc(sizeof(*t), GFP_KERNEL);
384 if (t == NULL)
385 return -ENOMEM;
386 memcpy(t, &parport_sysctl_template, sizeof(*t));
387
388 t->device_dir[0].extra1 = port;
389
390 for (i = 0; i < 8; i++)
391 t->vars[i].extra1 = port;
392
393 t->vars[0].data = &port->spintime;
394 t->vars[5].child = t->device_dir;
395
396 for (i = 0; i < 5; i++)
397 t->vars[6 + i].extra2 = &port->probe_info[i];
398
399 t->port_dir[0].procname = port->name;
400 t->port_dir[0].ctl_name = port->number + 1; /* nb 0 isn't legal here */
401
402 t->port_dir[0].child = t->vars;
403 t->parport_dir[0].child = t->port_dir;
404 t->dev_dir[0].child = t->parport_dir;
405
406 t->sysctl_header = register_sysctl_table(t->dev_dir, 0);
407 if (t->sysctl_header == NULL) {
408 kfree(t);
409 t = NULL;
410 }
411 port->sysctl_table = t;
412 return 0;
413 }
414
415 int parport_proc_unregister(struct parport *port)
416 {
417 if (port->sysctl_table) {
418 struct parport_sysctl_table *t = port->sysctl_table;
419 port->sysctl_table = NULL;
420 unregister_sysctl_table(t->sysctl_header);
421 kfree(t);
422 }
423 return 0;
424 }
425
426 int parport_device_proc_register(struct pardevice *device)
427 {
428 struct parport_device_sysctl_table *t;
429 struct parport * port = device->port;
430
431 t = kmalloc(sizeof(*t), GFP_KERNEL);
432 if (t == NULL)
433 return -ENOMEM;
434 memcpy(t, &parport_device_sysctl_template, sizeof(*t));
435
436 t->dev_dir[0].child = t->parport_dir;
437 t->parport_dir[0].child = t->port_dir;
438 t->port_dir[0].procname = port->name;
439 t->port_dir[0].ctl_name = port->number + 1; /* nb 0 isn't legal here */
440 t->port_dir[0].child = t->devices_root_dir;
441 t->devices_root_dir[0].child = t->device_dir;
442
443 #ifdef CONFIG_PARPORT_1284
444
445 t->device_dir[0].ctl_name =
446 parport_device_num(port->number, port->muxport,
447 device->daisy)
448 + 1; /* nb 0 isn't legal here */
449
450 #else /* No IEEE 1284 support */
451
452 /* parport_device_num isn't available. */
453 t->device_dir[0].ctl_name = 1;
454
455 #endif /* IEEE 1284 support or not */
456
457 t->device_dir[0].procname = device->name;
458 t->device_dir[0].extra1 = device;
459 t->device_dir[0].child = t->vars;
460 t->vars[0].data = &device->timeslice;
461
462 t->sysctl_header = register_sysctl_table(t->dev_dir, 0);
463 if (t->sysctl_header == NULL) {
464 kfree(t);
465 t = NULL;
466 }
467 device->sysctl_table = t;
468 return 0;
469 }
470
471 int parport_device_proc_unregister(struct pardevice *device)
472 {
473 if (device->sysctl_table) {
474 struct parport_device_sysctl_table *t = device->sysctl_table;
475 device->sysctl_table = NULL;
476 unregister_sysctl_table(t->sysctl_header);
477 kfree(t);
478 }
479 return 0;
480 }
481
482 int parport_default_proc_register(void)
483 {
484 parport_default_sysctl_table.sysctl_header =
485 register_sysctl_table(parport_default_sysctl_table.dev_dir, 0);
486 return 0;
487 }
488
489 int parport_default_proc_unregister(void)
490 {
491 if (parport_default_sysctl_table.sysctl_header) {
492 unregister_sysctl_table(parport_default_sysctl_table.
493 sysctl_header);
494 parport_default_sysctl_table.sysctl_header = NULL;
495 }
496 return 0;
497 }
498
499 #else /* no sysctl or no procfs*/
500
501 int parport_proc_register(struct parport *pp)
502 {
503 return 0;
504 }
505
506 int parport_proc_unregister(struct parport *pp)
507 {
508 return 0;
509 }
510
511 int parport_device_proc_register(struct pardevice *device)
512 {
513 return 0;
514 }
515
516 int parport_device_proc_unregister(struct pardevice *device)
517 {
518 return 0;
519 }
520
521 int parport_default_proc_register (void)
522 {
523 return 0;
524 }
525
526 int parport_default_proc_unregister (void)
527 {
528 return 0;
529 }
530 #endif
531