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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [parport/] [procfs.c] - Blame information for rev 1275

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1 1275 phoenix
/* 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

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