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1da177e4 LT |
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/init.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/errno.h> | |
20 | #include <linux/kernel.h> | |
21 | #include <linux/slab.h> | |
22 | #include <linux/parport.h> | |
23 | #include <linux/ctype.h> | |
24 | #include <linux/sysctl.h> | |
25 | ||
26 | #include <asm/uaccess.h> | |
27 | ||
28 | #if defined(CONFIG_SYSCTL) && defined(CONFIG_PROC_FS) | |
29 | ||
30 | #define PARPORT_MIN_TIMESLICE_VALUE 1ul | |
31 | #define PARPORT_MAX_TIMESLICE_VALUE ((unsigned long) HZ) | |
32 | #define PARPORT_MIN_SPINTIME_VALUE 1 | |
33 | #define PARPORT_MAX_SPINTIME_VALUE 1000 | |
34 | ||
35 | static int do_active_device(ctl_table *table, int write, struct file *filp, | |
36 | void __user *result, size_t *lenp, loff_t *ppos) | |
37 | { | |
38 | struct parport *port = (struct parport *)table->extra1; | |
39 | char buffer[256]; | |
40 | struct pardevice *dev; | |
41 | int len = 0; | |
42 | ||
43 | if (write) /* can't happen anyway */ | |
44 | return -EACCES; | |
45 | ||
46 | if (*ppos) { | |
47 | *lenp = 0; | |
48 | return 0; | |
49 | } | |
50 | ||
51 | for (dev = port->devices; dev ; dev = dev->next) { | |
52 | if(dev == port->cad) { | |
53 | len += sprintf(buffer, "%s\n", dev->name); | |
54 | } | |
55 | } | |
56 | ||
57 | if(!len) { | |
58 | len += sprintf(buffer, "%s\n", "none"); | |
59 | } | |
60 | ||
61 | if (len > *lenp) | |
62 | len = *lenp; | |
63 | else | |
64 | *lenp = len; | |
65 | ||
66 | *ppos += len; | |
67 | ||
68 | return copy_to_user(result, buffer, len) ? -EFAULT : 0; | |
69 | } | |
70 | ||
71 | #ifdef CONFIG_PARPORT_1284 | |
72 | static int do_autoprobe(ctl_table *table, int write, struct file *filp, | |
73 | void __user *result, size_t *lenp, loff_t *ppos) | |
74 | { | |
75 | struct parport_device_info *info = table->extra2; | |
76 | const char *str; | |
77 | char buffer[256]; | |
78 | int len = 0; | |
79 | ||
80 | if (write) /* permissions stop this */ | |
81 | return -EACCES; | |
82 | ||
83 | if (*ppos) { | |
84 | *lenp = 0; | |
85 | return 0; | |
86 | } | |
87 | ||
88 | if ((str = info->class_name) != NULL) | |
89 | len += sprintf (buffer + len, "CLASS:%s;\n", str); | |
90 | ||
91 | if ((str = info->model) != NULL) | |
92 | len += sprintf (buffer + len, "MODEL:%s;\n", str); | |
93 | ||
94 | if ((str = info->mfr) != NULL) | |
95 | len += sprintf (buffer + len, "MANUFACTURER:%s;\n", str); | |
96 | ||
97 | if ((str = info->description) != NULL) | |
98 | len += sprintf (buffer + len, "DESCRIPTION:%s;\n", str); | |
99 | ||
100 | if ((str = info->cmdset) != NULL) | |
101 | len += sprintf (buffer + len, "COMMAND SET:%s;\n", str); | |
102 | ||
103 | if (len > *lenp) | |
104 | len = *lenp; | |
105 | else | |
106 | *lenp = len; | |
107 | ||
108 | *ppos += len; | |
109 | ||
110 | return copy_to_user (result, buffer, len) ? -EFAULT : 0; | |
111 | } | |
112 | #endif /* IEEE1284.3 support. */ | |
113 | ||
114 | static int do_hardware_base_addr (ctl_table *table, int write, | |
115 | struct file *filp, void __user *result, | |
116 | size_t *lenp, loff_t *ppos) | |
117 | { | |
118 | struct parport *port = (struct parport *)table->extra1; | |
119 | char buffer[20]; | |
120 | int len = 0; | |
121 | ||
122 | if (*ppos) { | |
123 | *lenp = 0; | |
124 | return 0; | |
125 | } | |
126 | ||
127 | if (write) /* permissions prevent this anyway */ | |
128 | return -EACCES; | |
129 | ||
130 | len += sprintf (buffer, "%lu\t%lu\n", port->base, port->base_hi); | |
131 | ||
132 | if (len > *lenp) | |
133 | len = *lenp; | |
134 | else | |
135 | *lenp = len; | |
136 | ||
137 | *ppos += len; | |
138 | ||
139 | return copy_to_user(result, buffer, len) ? -EFAULT : 0; | |
140 | } | |
141 | ||
142 | static int do_hardware_irq (ctl_table *table, int write, | |
143 | struct file *filp, void __user *result, | |
144 | size_t *lenp, loff_t *ppos) | |
145 | { | |
146 | struct parport *port = (struct parport *)table->extra1; | |
147 | char buffer[20]; | |
148 | int len = 0; | |
149 | ||
150 | if (*ppos) { | |
151 | *lenp = 0; | |
152 | return 0; | |
153 | } | |
154 | ||
155 | if (write) /* permissions prevent this anyway */ | |
156 | return -EACCES; | |
157 | ||
158 | len += sprintf (buffer, "%d\n", port->irq); | |
159 | ||
160 | if (len > *lenp) | |
161 | len = *lenp; | |
162 | else | |
163 | *lenp = len; | |
164 | ||
165 | *ppos += len; | |
166 | ||
167 | return copy_to_user(result, buffer, len) ? -EFAULT : 0; | |
168 | } | |
169 | ||
170 | static int do_hardware_dma (ctl_table *table, int write, | |
171 | struct file *filp, void __user *result, | |
172 | size_t *lenp, loff_t *ppos) | |
173 | { | |
174 | struct parport *port = (struct parport *)table->extra1; | |
175 | char buffer[20]; | |
176 | int len = 0; | |
177 | ||
178 | if (*ppos) { | |
179 | *lenp = 0; | |
180 | return 0; | |
181 | } | |
182 | ||
183 | if (write) /* permissions prevent this anyway */ | |
184 | return -EACCES; | |
185 | ||
186 | len += sprintf (buffer, "%d\n", port->dma); | |
187 | ||
188 | if (len > *lenp) | |
189 | len = *lenp; | |
190 | else | |
191 | *lenp = len; | |
192 | ||
193 | *ppos += len; | |
194 | ||
195 | return copy_to_user(result, buffer, len) ? -EFAULT : 0; | |
196 | } | |
197 | ||
198 | static int do_hardware_modes (ctl_table *table, int write, | |
199 | struct file *filp, void __user *result, | |
200 | size_t *lenp, loff_t *ppos) | |
201 | { | |
202 | struct parport *port = (struct parport *)table->extra1; | |
203 | char buffer[40]; | |
204 | int len = 0; | |
205 | ||
206 | if (*ppos) { | |
207 | *lenp = 0; | |
208 | return 0; | |
209 | } | |
210 | ||
211 | if (write) /* permissions prevent this anyway */ | |
212 | return -EACCES; | |
213 | ||
214 | { | |
215 | #define printmode(x) {if(port->modes&PARPORT_MODE_##x){len+=sprintf(buffer+len,"%s%s",f?",":"",#x);f++;}} | |
216 | int f = 0; | |
217 | printmode(PCSPP); | |
218 | printmode(TRISTATE); | |
219 | printmode(COMPAT); | |
220 | printmode(EPP); | |
221 | printmode(ECP); | |
222 | printmode(DMA); | |
223 | #undef printmode | |
224 | } | |
225 | buffer[len++] = '\n'; | |
226 | ||
227 | if (len > *lenp) | |
228 | len = *lenp; | |
229 | else | |
230 | *lenp = len; | |
231 | ||
232 | *ppos += len; | |
233 | ||
234 | return copy_to_user(result, buffer, len) ? -EFAULT : 0; | |
235 | } | |
236 | ||
237 | #define PARPORT_PORT_DIR(child) { 0, NULL, NULL, 0, 0555, child } | |
238 | #define PARPORT_PARPORT_DIR(child) { DEV_PARPORT, "parport", \ | |
239 | NULL, 0, 0555, child } | |
240 | #define PARPORT_DEV_DIR(child) { CTL_DEV, "dev", NULL, 0, 0555, child } | |
241 | #define PARPORT_DEVICES_ROOT_DIR { DEV_PARPORT_DEVICES, "devices", \ | |
242 | NULL, 0, 0555, NULL } | |
243 | ||
244 | static const unsigned long parport_min_timeslice_value = | |
245 | PARPORT_MIN_TIMESLICE_VALUE; | |
246 | ||
247 | static const unsigned long parport_max_timeslice_value = | |
248 | PARPORT_MAX_TIMESLICE_VALUE; | |
249 | ||
250 | static const int parport_min_spintime_value = | |
251 | PARPORT_MIN_SPINTIME_VALUE; | |
252 | ||
253 | static const int parport_max_spintime_value = | |
254 | PARPORT_MAX_SPINTIME_VALUE; | |
255 | ||
256 | ||
257 | struct parport_sysctl_table { | |
258 | struct ctl_table_header *sysctl_header; | |
259 | ctl_table vars[12]; | |
260 | ctl_table device_dir[2]; | |
261 | ctl_table port_dir[2]; | |
262 | ctl_table parport_dir[2]; | |
263 | ctl_table dev_dir[2]; | |
264 | }; | |
265 | ||
266 | static const struct parport_sysctl_table parport_sysctl_template = { | |
267 | NULL, | |
268 | { | |
269 | { DEV_PARPORT_SPINTIME, "spintime", | |
270 | NULL, sizeof(int), 0644, NULL, | |
271 | &proc_dointvec_minmax, NULL, NULL, | |
272 | (void*) &parport_min_spintime_value, | |
273 | (void*) &parport_max_spintime_value }, | |
274 | { DEV_PARPORT_BASE_ADDR, "base-addr", | |
275 | NULL, 0, 0444, NULL, | |
276 | &do_hardware_base_addr }, | |
277 | { DEV_PARPORT_IRQ, "irq", | |
278 | NULL, 0, 0444, NULL, | |
279 | &do_hardware_irq }, | |
280 | { DEV_PARPORT_DMA, "dma", | |
281 | NULL, 0, 0444, NULL, | |
282 | &do_hardware_dma }, | |
283 | { DEV_PARPORT_MODES, "modes", | |
284 | NULL, 0, 0444, NULL, | |
285 | &do_hardware_modes }, | |
286 | PARPORT_DEVICES_ROOT_DIR, | |
287 | #ifdef CONFIG_PARPORT_1284 | |
288 | { DEV_PARPORT_AUTOPROBE, "autoprobe", | |
289 | NULL, 0, 0444, NULL, | |
290 | &do_autoprobe }, | |
291 | { DEV_PARPORT_AUTOPROBE + 1, "autoprobe0", | |
292 | NULL, 0, 0444, NULL, | |
293 | &do_autoprobe }, | |
294 | { DEV_PARPORT_AUTOPROBE + 2, "autoprobe1", | |
295 | NULL, 0, 0444, NULL, | |
296 | &do_autoprobe }, | |
297 | { DEV_PARPORT_AUTOPROBE + 3, "autoprobe2", | |
298 | NULL, 0, 0444, NULL, | |
299 | &do_autoprobe }, | |
300 | { DEV_PARPORT_AUTOPROBE + 4, "autoprobe3", | |
301 | NULL, 0, 0444, NULL, | |
302 | &do_autoprobe }, | |
303 | #endif /* IEEE 1284 support */ | |
304 | {0} | |
305 | }, | |
306 | { {DEV_PARPORT_DEVICES_ACTIVE, "active", NULL, 0, 0444, NULL, | |
307 | &do_active_device }, {0}}, | |
308 | { PARPORT_PORT_DIR(NULL), {0}}, | |
309 | { PARPORT_PARPORT_DIR(NULL), {0}}, | |
310 | { PARPORT_DEV_DIR(NULL), {0}} | |
311 | }; | |
312 | ||
313 | struct parport_device_sysctl_table | |
314 | { | |
315 | struct ctl_table_header *sysctl_header; | |
316 | ctl_table vars[2]; | |
317 | ctl_table device_dir[2]; | |
318 | ctl_table devices_root_dir[2]; | |
319 | ctl_table port_dir[2]; | |
320 | ctl_table parport_dir[2]; | |
321 | ctl_table dev_dir[2]; | |
322 | }; | |
323 | ||
324 | static const struct parport_device_sysctl_table | |
325 | parport_device_sysctl_template = { | |
326 | NULL, | |
327 | { | |
328 | { DEV_PARPORT_DEVICE_TIMESLICE, "timeslice", | |
329 | NULL, sizeof(int), 0644, NULL, | |
330 | &proc_doulongvec_ms_jiffies_minmax, NULL, NULL, | |
331 | (void*) &parport_min_timeslice_value, | |
332 | (void*) &parport_max_timeslice_value }, | |
333 | }, | |
334 | { {0, NULL, NULL, 0, 0555, NULL}, {0}}, | |
335 | { PARPORT_DEVICES_ROOT_DIR, {0}}, | |
336 | { PARPORT_PORT_DIR(NULL), {0}}, | |
337 | { PARPORT_PARPORT_DIR(NULL), {0}}, | |
338 | { PARPORT_DEV_DIR(NULL), {0}} | |
339 | }; | |
340 | ||
341 | struct parport_default_sysctl_table | |
342 | { | |
343 | struct ctl_table_header *sysctl_header; | |
344 | ctl_table vars[3]; | |
345 | ctl_table default_dir[2]; | |
346 | ctl_table parport_dir[2]; | |
347 | ctl_table dev_dir[2]; | |
348 | }; | |
349 | ||
350 | extern unsigned long parport_default_timeslice; | |
351 | extern int parport_default_spintime; | |
352 | ||
353 | static struct parport_default_sysctl_table | |
354 | parport_default_sysctl_table = { | |
355 | NULL, | |
356 | { | |
357 | { DEV_PARPORT_DEFAULT_TIMESLICE, "timeslice", | |
358 | &parport_default_timeslice, | |
359 | sizeof(parport_default_timeslice), 0644, NULL, | |
360 | &proc_doulongvec_ms_jiffies_minmax, NULL, NULL, | |
361 | (void*) &parport_min_timeslice_value, | |
362 | (void*) &parport_max_timeslice_value }, | |
363 | { DEV_PARPORT_DEFAULT_SPINTIME, "spintime", | |
364 | &parport_default_spintime, | |
365 | sizeof(parport_default_spintime), 0644, NULL, | |
366 | &proc_dointvec_minmax, NULL, NULL, | |
367 | (void*) &parport_min_spintime_value, | |
368 | (void*) &parport_max_spintime_value }, | |
369 | {0} | |
370 | }, | |
371 | { { DEV_PARPORT_DEFAULT, "default", NULL, 0, 0555, | |
372 | parport_default_sysctl_table.vars },{0}}, | |
373 | { | |
374 | PARPORT_PARPORT_DIR(parport_default_sysctl_table.default_dir), | |
375 | {0}}, | |
376 | { PARPORT_DEV_DIR(parport_default_sysctl_table.parport_dir), {0}} | |
377 | }; | |
378 | ||
379 | ||
380 | int parport_proc_register(struct parport *port) | |
381 | { | |
382 | struct parport_sysctl_table *t; | |
383 | int i; | |
384 | ||
385 | t = kmalloc(sizeof(*t), GFP_KERNEL); | |
386 | if (t == NULL) | |
387 | return -ENOMEM; | |
388 | memcpy(t, &parport_sysctl_template, sizeof(*t)); | |
389 | ||
390 | t->device_dir[0].extra1 = port; | |
391 | ||
392 | for (i = 0; i < 8; i++) | |
393 | t->vars[i].extra1 = port; | |
394 | ||
395 | t->vars[0].data = &port->spintime; | |
396 | t->vars[5].child = t->device_dir; | |
397 | ||
398 | for (i = 0; i < 5; i++) | |
399 | t->vars[6 + i].extra2 = &port->probe_info[i]; | |
400 | ||
401 | t->port_dir[0].procname = port->name; | |
402 | t->port_dir[0].ctl_name = port->number + 1; /* nb 0 isn't legal here */ | |
403 | ||
404 | t->port_dir[0].child = t->vars; | |
405 | t->parport_dir[0].child = t->port_dir; | |
406 | t->dev_dir[0].child = t->parport_dir; | |
407 | ||
408 | t->sysctl_header = register_sysctl_table(t->dev_dir, 0); | |
409 | if (t->sysctl_header == NULL) { | |
410 | kfree(t); | |
411 | t = NULL; | |
412 | } | |
413 | port->sysctl_table = t; | |
414 | return 0; | |
415 | } | |
416 | ||
417 | int parport_proc_unregister(struct parport *port) | |
418 | { | |
419 | if (port->sysctl_table) { | |
420 | struct parport_sysctl_table *t = port->sysctl_table; | |
421 | port->sysctl_table = NULL; | |
422 | unregister_sysctl_table(t->sysctl_header); | |
423 | kfree(t); | |
424 | } | |
425 | return 0; | |
426 | } | |
427 | ||
428 | int parport_device_proc_register(struct pardevice *device) | |
429 | { | |
430 | struct parport_device_sysctl_table *t; | |
431 | struct parport * port = device->port; | |
432 | ||
433 | t = kmalloc(sizeof(*t), GFP_KERNEL); | |
434 | if (t == NULL) | |
435 | return -ENOMEM; | |
436 | memcpy(t, &parport_device_sysctl_template, sizeof(*t)); | |
437 | ||
438 | t->dev_dir[0].child = t->parport_dir; | |
439 | t->parport_dir[0].child = t->port_dir; | |
440 | t->port_dir[0].procname = port->name; | |
441 | t->port_dir[0].ctl_name = port->number + 1; /* nb 0 isn't legal here */ | |
442 | t->port_dir[0].child = t->devices_root_dir; | |
443 | t->devices_root_dir[0].child = t->device_dir; | |
444 | ||
445 | #ifdef CONFIG_PARPORT_1284 | |
446 | ||
447 | t->device_dir[0].ctl_name = | |
448 | parport_device_num(port->number, port->muxport, | |
449 | device->daisy) | |
450 | + 1; /* nb 0 isn't legal here */ | |
451 | ||
452 | #else /* No IEEE 1284 support */ | |
453 | ||
454 | /* parport_device_num isn't available. */ | |
455 | t->device_dir[0].ctl_name = 1; | |
456 | ||
457 | #endif /* IEEE 1284 support or not */ | |
458 | ||
459 | t->device_dir[0].procname = device->name; | |
460 | t->device_dir[0].extra1 = device; | |
461 | t->device_dir[0].child = t->vars; | |
462 | t->vars[0].data = &device->timeslice; | |
463 | ||
464 | t->sysctl_header = register_sysctl_table(t->dev_dir, 0); | |
465 | if (t->sysctl_header == NULL) { | |
466 | kfree(t); | |
467 | t = NULL; | |
468 | } | |
469 | device->sysctl_table = t; | |
470 | return 0; | |
471 | } | |
472 | ||
473 | int parport_device_proc_unregister(struct pardevice *device) | |
474 | { | |
475 | if (device->sysctl_table) { | |
476 | struct parport_device_sysctl_table *t = device->sysctl_table; | |
477 | device->sysctl_table = NULL; | |
478 | unregister_sysctl_table(t->sysctl_header); | |
479 | kfree(t); | |
480 | } | |
481 | return 0; | |
482 | } | |
483 | ||
484 | static int __init parport_default_proc_register(void) | |
485 | { | |
486 | parport_default_sysctl_table.sysctl_header = | |
487 | register_sysctl_table(parport_default_sysctl_table.dev_dir, 0); | |
488 | return 0; | |
489 | } | |
490 | ||
491 | static void __exit parport_default_proc_unregister(void) | |
492 | { | |
493 | if (parport_default_sysctl_table.sysctl_header) { | |
494 | unregister_sysctl_table(parport_default_sysctl_table. | |
495 | sysctl_header); | |
496 | parport_default_sysctl_table.sysctl_header = NULL; | |
497 | } | |
498 | } | |
499 | ||
500 | #else /* no sysctl or no procfs*/ | |
501 | ||
502 | int parport_proc_register(struct parport *pp) | |
503 | { | |
504 | return 0; | |
505 | } | |
506 | ||
507 | int parport_proc_unregister(struct parport *pp) | |
508 | { | |
509 | return 0; | |
510 | } | |
511 | ||
512 | int parport_device_proc_register(struct pardevice *device) | |
513 | { | |
514 | return 0; | |
515 | } | |
516 | ||
517 | int parport_device_proc_unregister(struct pardevice *device) | |
518 | { | |
519 | return 0; | |
520 | } | |
521 | ||
522 | static int __init parport_default_proc_register (void) | |
523 | { | |
524 | return 0; | |
525 | } | |
526 | ||
527 | static void __exit parport_default_proc_unregister (void) | |
528 | { | |
529 | } | |
530 | #endif | |
531 | ||
532 | module_init(parport_default_proc_register) | |
533 | module_exit(parport_default_proc_unregister) |