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1da177e4 LT |
1 | /* Sysctl interface for parport devices. |
2 | * | |
bdca3f20 | 3 | * Authors: David Campbell |
1da177e4 LT |
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> | |
1da177e4 LT |
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) { 0, NULL, NULL, 0, 0555, child } | |
237 | #define PARPORT_PARPORT_DIR(child) { DEV_PARPORT, "parport", \ | |
238 | NULL, 0, 0555, child } | |
239 | #define PARPORT_DEV_DIR(child) { CTL_DEV, "dev", NULL, 0, 0555, child } | |
240 | #define PARPORT_DEVICES_ROOT_DIR { DEV_PARPORT_DEVICES, "devices", \ | |
241 | NULL, 0, 0555, 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 | NULL, | |
267 | { | |
268 | { DEV_PARPORT_SPINTIME, "spintime", | |
269 | NULL, sizeof(int), 0644, NULL, | |
270 | &proc_dointvec_minmax, NULL, NULL, | |
271 | (void*) &parport_min_spintime_value, | |
272 | (void*) &parport_max_spintime_value }, | |
273 | { DEV_PARPORT_BASE_ADDR, "base-addr", | |
274 | NULL, 0, 0444, NULL, | |
275 | &do_hardware_base_addr }, | |
276 | { DEV_PARPORT_IRQ, "irq", | |
277 | NULL, 0, 0444, NULL, | |
278 | &do_hardware_irq }, | |
279 | { DEV_PARPORT_DMA, "dma", | |
280 | NULL, 0, 0444, NULL, | |
281 | &do_hardware_dma }, | |
282 | { DEV_PARPORT_MODES, "modes", | |
283 | NULL, 0, 0444, NULL, | |
284 | &do_hardware_modes }, | |
285 | PARPORT_DEVICES_ROOT_DIR, | |
286 | #ifdef CONFIG_PARPORT_1284 | |
287 | { DEV_PARPORT_AUTOPROBE, "autoprobe", | |
288 | NULL, 0, 0444, NULL, | |
289 | &do_autoprobe }, | |
290 | { DEV_PARPORT_AUTOPROBE + 1, "autoprobe0", | |
291 | NULL, 0, 0444, NULL, | |
292 | &do_autoprobe }, | |
293 | { DEV_PARPORT_AUTOPROBE + 2, "autoprobe1", | |
294 | NULL, 0, 0444, NULL, | |
295 | &do_autoprobe }, | |
296 | { DEV_PARPORT_AUTOPROBE + 3, "autoprobe2", | |
297 | NULL, 0, 0444, NULL, | |
298 | &do_autoprobe }, | |
299 | { DEV_PARPORT_AUTOPROBE + 4, "autoprobe3", | |
300 | NULL, 0, 0444, NULL, | |
301 | &do_autoprobe }, | |
302 | #endif /* IEEE 1284 support */ | |
303 | {0} | |
304 | }, | |
305 | { {DEV_PARPORT_DEVICES_ACTIVE, "active", NULL, 0, 0444, NULL, | |
306 | &do_active_device }, {0}}, | |
307 | { PARPORT_PORT_DIR(NULL), {0}}, | |
308 | { PARPORT_PARPORT_DIR(NULL), {0}}, | |
309 | { PARPORT_DEV_DIR(NULL), {0}} | |
310 | }; | |
311 | ||
312 | struct parport_device_sysctl_table | |
313 | { | |
314 | struct ctl_table_header *sysctl_header; | |
315 | ctl_table vars[2]; | |
316 | ctl_table device_dir[2]; | |
317 | ctl_table devices_root_dir[2]; | |
318 | ctl_table port_dir[2]; | |
319 | ctl_table parport_dir[2]; | |
320 | ctl_table dev_dir[2]; | |
321 | }; | |
322 | ||
323 | static const struct parport_device_sysctl_table | |
324 | parport_device_sysctl_template = { | |
325 | NULL, | |
326 | { | |
327 | { DEV_PARPORT_DEVICE_TIMESLICE, "timeslice", | |
328 | NULL, sizeof(int), 0644, NULL, | |
329 | &proc_doulongvec_ms_jiffies_minmax, NULL, NULL, | |
330 | (void*) &parport_min_timeslice_value, | |
331 | (void*) &parport_max_timeslice_value }, | |
332 | }, | |
333 | { {0, NULL, NULL, 0, 0555, NULL}, {0}}, | |
334 | { PARPORT_DEVICES_ROOT_DIR, {0}}, | |
335 | { PARPORT_PORT_DIR(NULL), {0}}, | |
336 | { PARPORT_PARPORT_DIR(NULL), {0}}, | |
337 | { PARPORT_DEV_DIR(NULL), {0}} | |
338 | }; | |
339 | ||
340 | struct parport_default_sysctl_table | |
341 | { | |
342 | struct ctl_table_header *sysctl_header; | |
343 | ctl_table vars[3]; | |
344 | ctl_table default_dir[2]; | |
345 | ctl_table parport_dir[2]; | |
346 | ctl_table dev_dir[2]; | |
347 | }; | |
348 | ||
349 | extern unsigned long parport_default_timeslice; | |
350 | extern int parport_default_spintime; | |
351 | ||
352 | static struct parport_default_sysctl_table | |
353 | parport_default_sysctl_table = { | |
354 | NULL, | |
355 | { | |
356 | { DEV_PARPORT_DEFAULT_TIMESLICE, "timeslice", | |
357 | &parport_default_timeslice, | |
358 | sizeof(parport_default_timeslice), 0644, NULL, | |
359 | &proc_doulongvec_ms_jiffies_minmax, NULL, NULL, | |
360 | (void*) &parport_min_timeslice_value, | |
361 | (void*) &parport_max_timeslice_value }, | |
362 | { DEV_PARPORT_DEFAULT_SPINTIME, "spintime", | |
363 | &parport_default_spintime, | |
364 | sizeof(parport_default_spintime), 0644, NULL, | |
365 | &proc_dointvec_minmax, NULL, NULL, | |
366 | (void*) &parport_min_spintime_value, | |
367 | (void*) &parport_max_spintime_value }, | |
368 | {0} | |
369 | }, | |
370 | { { DEV_PARPORT_DEFAULT, "default", NULL, 0, 0555, | |
371 | parport_default_sysctl_table.vars },{0}}, | |
372 | { | |
373 | PARPORT_PARPORT_DIR(parport_default_sysctl_table.default_dir), | |
374 | {0}}, | |
375 | { PARPORT_DEV_DIR(parport_default_sysctl_table.parport_dir), {0}} | |
376 | }; | |
377 | ||
378 | ||
379 | int parport_proc_register(struct parport *port) | |
380 | { | |
381 | struct parport_sysctl_table *t; | |
382 | int i; | |
383 | ||
384 | t = kmalloc(sizeof(*t), GFP_KERNEL); | |
385 | if (t == NULL) | |
386 | return -ENOMEM; | |
387 | memcpy(t, &parport_sysctl_template, sizeof(*t)); | |
388 | ||
389 | t->device_dir[0].extra1 = port; | |
390 | ||
391 | for (i = 0; i < 8; i++) | |
392 | t->vars[i].extra1 = port; | |
393 | ||
394 | t->vars[0].data = &port->spintime; | |
395 | t->vars[5].child = t->device_dir; | |
396 | ||
397 | for (i = 0; i < 5; i++) | |
398 | t->vars[6 + i].extra2 = &port->probe_info[i]; | |
399 | ||
400 | t->port_dir[0].procname = port->name; | |
401 | t->port_dir[0].ctl_name = port->number + 1; /* nb 0 isn't legal here */ | |
402 | ||
403 | t->port_dir[0].child = t->vars; | |
404 | t->parport_dir[0].child = t->port_dir; | |
405 | t->dev_dir[0].child = t->parport_dir; | |
406 | ||
407 | t->sysctl_header = register_sysctl_table(t->dev_dir, 0); | |
408 | if (t->sysctl_header == NULL) { | |
409 | kfree(t); | |
410 | t = NULL; | |
411 | } | |
412 | port->sysctl_table = t; | |
413 | return 0; | |
414 | } | |
415 | ||
416 | int parport_proc_unregister(struct parport *port) | |
417 | { | |
418 | if (port->sysctl_table) { | |
419 | struct parport_sysctl_table *t = port->sysctl_table; | |
420 | port->sysctl_table = NULL; | |
421 | unregister_sysctl_table(t->sysctl_header); | |
422 | kfree(t); | |
423 | } | |
424 | return 0; | |
425 | } | |
426 | ||
427 | int parport_device_proc_register(struct pardevice *device) | |
428 | { | |
429 | struct parport_device_sysctl_table *t; | |
430 | struct parport * port = device->port; | |
431 | ||
432 | t = kmalloc(sizeof(*t), GFP_KERNEL); | |
433 | if (t == NULL) | |
434 | return -ENOMEM; | |
435 | memcpy(t, &parport_device_sysctl_template, sizeof(*t)); | |
436 | ||
437 | t->dev_dir[0].child = t->parport_dir; | |
438 | t->parport_dir[0].child = t->port_dir; | |
439 | t->port_dir[0].procname = port->name; | |
440 | t->port_dir[0].ctl_name = port->number + 1; /* nb 0 isn't legal here */ | |
441 | t->port_dir[0].child = t->devices_root_dir; | |
442 | t->devices_root_dir[0].child = t->device_dir; | |
443 | ||
444 | #ifdef CONFIG_PARPORT_1284 | |
445 | ||
446 | t->device_dir[0].ctl_name = | |
447 | parport_device_num(port->number, port->muxport, | |
448 | device->daisy) | |
449 | + 1; /* nb 0 isn't legal here */ | |
450 | ||
451 | #else /* No IEEE 1284 support */ | |
452 | ||
453 | /* parport_device_num isn't available. */ | |
454 | t->device_dir[0].ctl_name = 1; | |
455 | ||
456 | #endif /* IEEE 1284 support or not */ | |
457 | ||
458 | t->device_dir[0].procname = device->name; | |
459 | t->device_dir[0].extra1 = device; | |
460 | t->device_dir[0].child = t->vars; | |
461 | t->vars[0].data = &device->timeslice; | |
462 | ||
463 | t->sysctl_header = register_sysctl_table(t->dev_dir, 0); | |
464 | if (t->sysctl_header == NULL) { | |
465 | kfree(t); | |
466 | t = NULL; | |
467 | } | |
468 | device->sysctl_table = t; | |
469 | return 0; | |
470 | } | |
471 | ||
472 | int parport_device_proc_unregister(struct pardevice *device) | |
473 | { | |
474 | if (device->sysctl_table) { | |
475 | struct parport_device_sysctl_table *t = device->sysctl_table; | |
476 | device->sysctl_table = NULL; | |
477 | unregister_sysctl_table(t->sysctl_header); | |
478 | kfree(t); | |
479 | } | |
480 | return 0; | |
481 | } | |
482 | ||
483 | static int __init parport_default_proc_register(void) | |
484 | { | |
485 | parport_default_sysctl_table.sysctl_header = | |
486 | register_sysctl_table(parport_default_sysctl_table.dev_dir, 0); | |
487 | return 0; | |
488 | } | |
489 | ||
490 | static void __exit parport_default_proc_unregister(void) | |
491 | { | |
492 | if (parport_default_sysctl_table.sysctl_header) { | |
493 | unregister_sysctl_table(parport_default_sysctl_table. | |
494 | sysctl_header); | |
495 | parport_default_sysctl_table.sysctl_header = NULL; | |
496 | } | |
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 | static int __init parport_default_proc_register (void) | |
522 | { | |
523 | return 0; | |
524 | } | |
525 | ||
526 | static void __exit parport_default_proc_unregister (void) | |
527 | { | |
528 | } | |
529 | #endif | |
530 | ||
531 | module_init(parport_default_proc_register) | |
532 | module_exit(parport_default_proc_unregister) |