drivers/staging/dgrp/dgrp_sysfs.c

   1 /*
   2  * Copyright 2004 Digi International (www.digi.com)
   3  *      Scott H Kilau <Scott_Kilau at digi dot com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2, or (at your option)
   8  * any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the
  12  * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
  13  * PURPOSE.  See the GNU General Public License for more details.
  14  *
  15  */
  16
  17 #include "dgrp_common.h"
  18
  19 #include <linux/kernel.h>
  20 #include <linux/module.h>
  21 #include <linux/ctype.h>
  22 #include <linux/string.h>
  23 #include <linux/serial_reg.h>
  24 #include <linux/pci.h>
  25 #include <linux/kdev_t.h>
  26
  27
  28 #define PORTSERVER_DIVIDEND 1843200
  29 #define SERIAL_TYPE_NORMAL      1
  30 #define SERIAL_TYPE_CALLOUT     2
  31 #define SERIAL_TYPE_XPRINT      3
  32
  33
  34 static struct class *dgrp_class;
  35 static struct device *dgrp_class_nodes_dev;
  36 static struct device *dgrp_class_global_settings_dev;
  37
  38
  39 static ssize_t dgrp_class_version_show(struct class *class,
  40                                        struct class_attribute *attr, char *buf)
  41 {
  42         return snprintf(buf, PAGE_SIZE, "%s\n", DIGI_VERSION);
  43 }
  44 static CLASS_ATTR(driver_version, 0400, dgrp_class_version_show, NULL);
  45
  46
  47 static ssize_t dgrp_class_register_with_sysfs_show(struct device *c,
  48                                                    struct device_attribute *attr,
  49                                                    char *buf)
  50 {
  51         return snprintf(buf, PAGE_SIZE, "1\n");
  52 }
  53 static DEVICE_ATTR(register_with_sysfs, 0400,
  54                    dgrp_class_register_with_sysfs_show, NULL);
  55
  56
  57 static ssize_t dgrp_class_pollrate_show(struct device *c,
  58                                         struct device_attribute *attr,
  59                                         char *buf)
  60 {
  61         return snprintf(buf, PAGE_SIZE, "%d\n", dgrp_poll_tick);
  62 }
  63
  64 static ssize_t dgrp_class_pollrate_store(struct device *c,
  65                                          struct device_attribute *attr,
  66                                          const char *buf, size_t count)
  67 {
  68         sscanf(buf, "0x%x\n", &dgrp_poll_tick);
  69         return count;
  70 }
  71 static DEVICE_ATTR(pollrate, 0600, dgrp_class_pollrate_show,
  72                    dgrp_class_pollrate_store);
  73
  74 static struct attribute *dgrp_sysfs_global_settings_entries[] = {
  75         &dev_attr_pollrate.attr,
  76         &dev_attr_register_with_sysfs.attr,
  77         NULL
  78 };
  79
  80
  81 static struct attribute_group dgrp_global_settings_attribute_group = {
  82         .name = NULL,
  83         .attrs = dgrp_sysfs_global_settings_entries,
  84 };
  85
  86
  87
  88 void dgrp_create_class_sysfs_files(void)
  89 {
  90         int ret = 0;
  91         int max_majors = 1U << (32 - MINORBITS);
  92
  93         dgrp_class = class_create(THIS_MODULE, "digi_realport");
  94         ret = class_create_file(dgrp_class, &class_attr_driver_version);
  95
  96         dgrp_class_global_settings_dev = device_create(dgrp_class, NULL,
  97                 MKDEV(0, max_majors + 1), NULL, "driver_settings");
  98
  99         ret = sysfs_create_group(&dgrp_class_global_settings_dev->kobj,
 100                 &dgrp_global_settings_attribute_group);
 101         if (ret) {
 102                 pr_alert("%s: failed to create sysfs global settings device attributes.\n",
 103                         __func__);
 104                 sysfs_remove_group(&dgrp_class_global_settings_dev->kobj,
 105                         &dgrp_global_settings_attribute_group);
 106                 return;
 107         }
 108
 109         dgrp_class_nodes_dev = device_create(dgrp_class, NULL,
 110                 MKDEV(0, max_majors + 2), NULL, "nodes");
 111
 112 }
 113
 114
 115 void dgrp_remove_class_sysfs_files(void)
 116 {
 117         struct nd_struct *nd;
 118         int max_majors = 1U << (32 - MINORBITS);
 119
 120         list_for_each_entry(nd, &nd_struct_list, list)
 121                 dgrp_remove_node_class_sysfs_files(nd);
 122
 123         sysfs_remove_group(&dgrp_class_global_settings_dev->kobj,
 124                 &dgrp_global_settings_attribute_group);
 125
 126         class_remove_file(dgrp_class, &class_attr_driver_version);
 127
 128         device_destroy(dgrp_class, MKDEV(0, max_majors + 1));
 129         device_destroy(dgrp_class, MKDEV(0, max_majors + 2));
 130         class_destroy(dgrp_class);
 131 }
 132
 133 static ssize_t dgrp_node_state_show(struct device *c,
 134                                     struct device_attribute *attr, char *buf)
 135 {
 136         struct nd_struct *nd;
 137
 138         if (!c)
 139                 return 0;
 140         nd = (struct nd_struct *) dev_get_drvdata(c);
 141         if (!nd)
 142                 return 0;
 143
 144         return snprintf(buf, PAGE_SIZE, "%s\n", ND_STATE_STR(nd->nd_state));
 145 }
 146
 147 static DEVICE_ATTR(state, 0600, dgrp_node_state_show, NULL);
 148
 149 static ssize_t dgrp_node_description_show(struct device *c,
 150                                           struct device_attribute *attr,
 151                                           char *buf)
 152 {
 153         struct nd_struct *nd;
 154
 155         if (!c)
 156                 return 0;
 157         nd = (struct nd_struct *) dev_get_drvdata(c);
 158         if (!nd)
 159                 return 0;
 160
 161         if (nd->nd_state == NS_READY)
 162                 return snprintf(buf, PAGE_SIZE, "%s\n", nd->nd_ps_desc);
 163         return 0;
 164 }
 165 static DEVICE_ATTR(description_info, 0600, dgrp_node_description_show, NULL);
 166
 167 static ssize_t dgrp_node_hw_version_show(struct device *c,
 168                                          struct device_attribute *attr,
 169                                          char *buf)
 170 {
 171         struct nd_struct *nd;
 172
 173         if (!c)
 174                 return 0;
 175         nd = (struct nd_struct *) dev_get_drvdata(c);
 176         if (!nd)
 177                 return 0;
 178
 179         if (nd->nd_state == NS_READY)
 180                 return snprintf(buf, PAGE_SIZE, "%d.%d\n",
 181                                 (nd->nd_hw_ver >> 8) & 0xff,
 182                                 nd->nd_hw_ver & 0xff);
 183
 184         return 0;
 185 }
 186 static DEVICE_ATTR(hw_version_info, 0600, dgrp_node_hw_version_show, NULL);
 187
 188 static ssize_t dgrp_node_hw_id_show(struct device *c,
 189                                     struct device_attribute *attr, char *buf)
 190 {
 191         struct nd_struct *nd;
 192
 193         if (!c)
 194                 return 0;
 195         nd = (struct nd_struct *) dev_get_drvdata(c);
 196         if (!nd)
 197                 return 0;
 198
 199
 200         if (nd->nd_state == NS_READY)
 201                 return snprintf(buf, PAGE_SIZE, "%d\n", nd->nd_hw_id);
 202         return 0;
 203 }
 204 static DEVICE_ATTR(hw_id_info, 0600, dgrp_node_hw_id_show, NULL);
 205
 206 static ssize_t dgrp_node_sw_version_show(struct device *c,
 207                                          struct device_attribute *attr,
 208                                          char *buf)
 209 {
 210         struct nd_struct *nd;
 211
 212         if (!c)
 213                 return 0;
 214
 215         nd = (struct nd_struct *) dev_get_drvdata(c);
 216         if (!nd)
 217                 return 0;
 218
 219         if (nd->nd_state == NS_READY)
 220                 return snprintf(buf, PAGE_SIZE, "%d.%d\n",
 221                                 (nd->nd_sw_ver >> 8) & 0xff,
 222                                 nd->nd_sw_ver & 0xff);
 223
 224         return 0;
 225 }
 226 static DEVICE_ATTR(sw_version_info, 0600, dgrp_node_sw_version_show, NULL);
 227
 228
 229 static struct attribute *dgrp_sysfs_node_entries[] = {
 230         &dev_attr_state.attr,
 231         &dev_attr_description_info.attr,
 232         &dev_attr_hw_version_info.attr,
 233         &dev_attr_hw_id_info.attr,
 234         &dev_attr_sw_version_info.attr,
 235         NULL
 236 };
 237
 238
 239 static struct attribute_group dgrp_node_attribute_group = {
 240         .name = NULL,
 241         .attrs = dgrp_sysfs_node_entries,
 242 };
 243
 244
 245 void dgrp_create_node_class_sysfs_files(struct nd_struct *nd)
 246 {
 247         int ret;
 248         char name[10];
 249
 250         if (nd->nd_ID)
 251                 ID_TO_CHAR(nd->nd_ID, name);
 252         else
 253                 sprintf(name, "node%ld", nd->nd_major);
 254
 255         nd->nd_class_dev = device_create(dgrp_class, dgrp_class_nodes_dev,
 256                 MKDEV(0, nd->nd_major), NULL, name);
 257
 258         ret = sysfs_create_group(&nd->nd_class_dev->kobj,
 259                                  &dgrp_node_attribute_group);
 260
 261         if (ret) {
 262                 pr_alert("%s: failed to create sysfs node device attributes.\n",
 263                         __func__);
 264                 sysfs_remove_group(&nd->nd_class_dev->kobj,
 265                                    &dgrp_node_attribute_group);
 266                 return;
 267         }
 268
 269         dev_set_drvdata(nd->nd_class_dev, nd);
 270
 271 }
 272
 273
 274 void dgrp_remove_node_class_sysfs_files(struct nd_struct *nd)
 275 {
 276         if (nd->nd_class_dev) {
 277                 sysfs_remove_group(&nd->nd_class_dev->kobj,
 278                                    &dgrp_node_attribute_group);
 279
 280                 device_destroy(dgrp_class, MKDEV(0, nd->nd_major));
 281                 nd->nd_class_dev = NULL;
 282         }
 283 }
 284
 285
 286
 287 static ssize_t dgrp_tty_state_show(struct device *d,
 288                                    struct device_attribute *attr, char *buf)
 289 {
 290         struct un_struct *un;
 291
 292         if (!d)
 293                 return 0;
 294         un = (struct un_struct *) dev_get_drvdata(d);
 295         if (!un)
 296                 return 0;
 297
 298         return snprintf(buf, PAGE_SIZE, "%s\n",
 299                         un->un_open_count ? "Open" : "Closed");
 300 }
 301 static DEVICE_ATTR(state_info, 0600, dgrp_tty_state_show, NULL);
 302
 303 static ssize_t dgrp_tty_baud_show(struct device *d,
 304                                   struct device_attribute *attr, char *buf)
 305 {
 306         struct ch_struct *ch;
 307         struct un_struct *un;
 308
 309         if (!d)
 310                 return 0;
 311         un = (struct un_struct *) dev_get_drvdata(d);
 312         if (!un)
 313                 return 0;
 314         ch = un->un_ch;
 315         if (!ch)
 316                 return 0;
 317         return snprintf(buf, PAGE_SIZE, "%d\n",
 318                 un->un_open_count ? (PORTSERVER_DIVIDEND / ch->ch_s_brate) : 0);
 319 }
 320 static DEVICE_ATTR(baud_info, 0400, dgrp_tty_baud_show, NULL);
 321
 322
 323 static ssize_t dgrp_tty_msignals_show(struct device *d,
 324                                       struct device_attribute *attr, char *buf)
 325 {
 326         struct ch_struct *ch;
 327         struct un_struct *un;
 328
 329         if (!d)
 330                 return 0;
 331         un = (struct un_struct *) dev_get_drvdata(d);
 332         if (!un)
 333                 return 0;
 334         ch = un->un_ch;
 335         if (!ch)
 336                 return 0;
 337
 338         if (ch->ch_open_count) {
 339                 return snprintf(buf, PAGE_SIZE, "%s %s %s %s %s %s\n",
 340                         (ch->ch_s_mlast & DM_RTS) ? "RTS" : "",
 341                         (ch->ch_s_mlast & DM_CTS) ? "CTS" : "",
 342                         (ch->ch_s_mlast & DM_DTR) ? "DTR" : "",
 343                         (ch->ch_s_mlast & DM_DSR) ? "DSR" : "",
 344                         (ch->ch_s_mlast & DM_CD) ? "DCD" : "",
 345                         (ch->ch_s_mlast & DM_RI)  ? "RI"  : "");
 346         }
 347         return 0;
 348 }
 349 static DEVICE_ATTR(msignals_info, 0400, dgrp_tty_msignals_show, NULL);
 350
 351
 352 static ssize_t dgrp_tty_iflag_show(struct device *d,
 353                                    struct device_attribute *attr, char *buf)
 354 {
 355         struct ch_struct *ch;
 356         struct un_struct *un;
 357
 358         if (!d)
 359                 return 0;
 360         un = (struct un_struct *) dev_get_drvdata(d);
 361         if (!un)
 362                 return 0;
 363         ch = un->un_ch;
 364         if (!ch)
 365                 return 0;
 366         return snprintf(buf, PAGE_SIZE, "%x\n", ch->ch_s_iflag);
 367 }
 368 static DEVICE_ATTR(iflag_info, 0600, dgrp_tty_iflag_show, NULL);
 369
 370
 371 static ssize_t dgrp_tty_cflag_show(struct device *d,
 372                                    struct device_attribute *attr, char *buf)
 373 {
 374         struct ch_struct *ch;
 375         struct un_struct *un;
 376
 377         if (!d)
 378                 return 0;
 379         un = (struct un_struct *) dev_get_drvdata(d);
 380         if (!un)
 381                 return 0;
 382         ch = un->un_ch;
 383         if (!ch)
 384                 return 0;
 385         return snprintf(buf, PAGE_SIZE, "%x\n", ch->ch_s_cflag);
 386 }
 387 static DEVICE_ATTR(cflag_info, 0600, dgrp_tty_cflag_show, NULL);
 388
 389
 390 static ssize_t dgrp_tty_oflag_show(struct device *d,
 391                                    struct device_attribute *attr, char *buf)
 392 {
 393         struct ch_struct *ch;
 394         struct un_struct *un;
 395
 396         if (!d)
 397                 return 0;
 398         un = (struct un_struct *) dev_get_drvdata(d);
 399         if (!un)
 400                 return 0;
 401         ch = un->un_ch;
 402         if (!ch)
 403                 return 0;
 404         return snprintf(buf, PAGE_SIZE, "%x\n", ch->ch_s_oflag);
 405 }
 406 static DEVICE_ATTR(oflag_info, 0600, dgrp_tty_oflag_show, NULL);
 407
 408
 409 static ssize_t dgrp_tty_digi_flag_show(struct device *d,
 410                                        struct device_attribute *attr, char *buf)
 411 {
 412         struct ch_struct *ch;
 413         struct un_struct *un;
 414
 415         if (!d)
 416                 return 0;
 417         un = (struct un_struct *) dev_get_drvdata(d);
 418         if (!un)
 419                 return 0;
 420         ch = un->un_ch;
 421         if (!ch)
 422                 return 0;
 423         return snprintf(buf, PAGE_SIZE, "%x\n", ch->ch_digi.digi_flags);
 424 }
 425 static DEVICE_ATTR(digi_flag_info, 0600, dgrp_tty_digi_flag_show, NULL);
 426
 427
 428 static ssize_t dgrp_tty_rxcount_show(struct device *d,
 429                                      struct device_attribute *attr, char *buf)
 430 {
 431         struct ch_struct *ch;
 432         struct un_struct *un;
 433
 434         if (!d)
 435                 return 0;
 436         un = (struct un_struct *) dev_get_drvdata(d);
 437         if (!un)
 438                 return 0;
 439         ch = un->un_ch;
 440         if (!ch)
 441                 return 0;
 442         return snprintf(buf, PAGE_SIZE, "%d\n", ch->ch_rxcount);
 443 }
 444 static DEVICE_ATTR(rxcount_info, 0600, dgrp_tty_rxcount_show, NULL);
 445
 446
 447 static ssize_t dgrp_tty_txcount_show(struct device *d,
 448                                      struct device_attribute *attr, char *buf)
 449 {
 450         struct ch_struct *ch;
 451         struct un_struct *un;
 452
 453         if (!d)
 454                 return 0;
 455         un = (struct un_struct *) dev_get_drvdata(d);
 456         if (!un)
 457                 return 0;
 458         ch = un->un_ch;
 459         if (!ch)
 460                 return 0;
 461         return snprintf(buf, PAGE_SIZE, "%d\n", ch->ch_txcount);
 462 }
 463 static DEVICE_ATTR(txcount_info, 0600, dgrp_tty_txcount_show, NULL);
 464
 465
 466 static ssize_t dgrp_tty_name_show(struct device *d,
 467                                   struct device_attribute *attr, char *buf)
 468 {
 469         struct nd_struct *nd;
 470         struct ch_struct *ch;
 471         struct un_struct *un;
 472         char name[10];
 473
 474         if (!d)
 475                 return 0;
 476         un = (struct un_struct *) dev_get_drvdata(d);
 477         if (!un)
 478                 return 0;
 479         ch = un->un_ch;
 480         if (!ch)
 481                 return 0;
 482         nd = ch->ch_nd;
 483         if (!nd)
 484                 return 0;
 485
 486         ID_TO_CHAR(nd->nd_ID, name);
 487
 488         return snprintf(buf, PAGE_SIZE, "%s%s%02d\n",
 489                 un->un_type == SERIAL_TYPE_XPRINT ? "pr" : "tty",
 490                 name, ch->ch_portnum);
 491 }
 492 static DEVICE_ATTR(custom_name, 0600, dgrp_tty_name_show, NULL);
 493
 494
 495 static struct attribute *dgrp_sysfs_tty_entries[] = {
 496         &dev_attr_state_info.attr,
 497         &dev_attr_baud_info.attr,
 498         &dev_attr_msignals_info.attr,
 499         &dev_attr_iflag_info.attr,
 500         &dev_attr_cflag_info.attr,
 501         &dev_attr_oflag_info.attr,
 502         &dev_attr_digi_flag_info.attr,
 503         &dev_attr_rxcount_info.attr,
 504         &dev_attr_txcount_info.attr,
 505         &dev_attr_custom_name.attr,
 506         NULL
 507 };
 508
 509
 510 static struct attribute_group dgrp_tty_attribute_group = {
 511         .name = NULL,
 512         .attrs = dgrp_sysfs_tty_entries,
 513 };
 514
 515
 516 void dgrp_create_tty_sysfs(struct un_struct *un, struct device *c)
 517 {
 518         int ret;
 519
 520         ret = sysfs_create_group(&c->kobj, &dgrp_tty_attribute_group);
 521         if (ret) {
 522                 pr_alert("%s: failed to create sysfs tty device attributes.\n",
 523                         __func__);
 524                 sysfs_remove_group(&c->kobj, &dgrp_tty_attribute_group);
 525                 return;
 526         }
 527
 528         dev_set_drvdata(c, un);
 529
 530 }
 531
 532
 533 void dgrp_remove_tty_sysfs(struct device *c)
 534 {
 535         sysfs_remove_group(&c->kobj, &dgrp_tty_attribute_group);
 536 }