tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
34static 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
71static 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
113static 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
141static 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
169static 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
197static 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
243static const unsigned long parport_min_timeslice_value =
244PARPORT_MIN_TIMESLICE_VALUE;
245
246static const unsigned long parport_max_timeslice_value =
247PARPORT_MAX_TIMESLICE_VALUE;
248
249static const int parport_min_spintime_value =
250PARPORT_MIN_SPINTIME_VALUE;
251
252static const int parport_max_spintime_value =
253PARPORT_MAX_SPINTIME_VALUE;
254
255
256struct 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
265static 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
312struct 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
323static const struct parport_device_sysctl_table
324parport_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
340struct 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
349extern unsigned long parport_default_timeslice;
350extern int parport_default_spintime;
351
352static struct parport_default_sysctl_table
353parport_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
379int 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
416int 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
427int 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
472int 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
483static 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
490static 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
501int parport_proc_register(struct parport *pp)
502{
503 return 0;
504}
505
506int parport_proc_unregister(struct parport *pp)
507{
508 return 0;
509}
510
511int parport_device_proc_register(struct pardevice *device)
512{
513 return 0;
514}
515
516int parport_device_proc_unregister(struct pardevice *device)
517{
518 return 0;
519}
520
521static int __init parport_default_proc_register (void)
522{
523 return 0;
524}
525
526static void __exit parport_default_proc_unregister (void)
527{
528}
529#endif
530
531module_init(parport_default_proc_register)
532module_exit(parport_default_proc_unregister)