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) 534