Bill Pemberton | 0b52b74 | 2012-09-20 16:55:27 -0400 | [diff] [blame] | 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/version.h> |
| 21 | #include <linux/module.h> |
| 22 | #include <linux/ctype.h> |
| 23 | #include <linux/string.h> |
| 24 | #include <linux/serial_reg.h> |
| 25 | #include <linux/pci.h> |
| 26 | #include <linux/kdev_t.h> |
| 27 | |
| 28 | |
| 29 | #define PORTSERVER_DIVIDEND 1843200 |
| 30 | #define SERIAL_TYPE_NORMAL 1 |
| 31 | #define SERIAL_TYPE_CALLOUT 2 |
| 32 | #define SERIAL_TYPE_XPRINT 3 |
| 33 | |
| 34 | |
| 35 | static struct class *dgrp_class; |
| 36 | static struct device *dgrp_class_nodes_dev; |
| 37 | static struct device *dgrp_class_global_settings_dev; |
| 38 | |
| 39 | |
| 40 | static ssize_t dgrp_class_version_show(struct class *class, |
| 41 | struct class_attribute *attr, char *buf) |
| 42 | { |
| 43 | return snprintf(buf, PAGE_SIZE, "%s\n", DIGI_VERSION); |
| 44 | } |
| 45 | static CLASS_ATTR(driver_version, 0400, dgrp_class_version_show, NULL); |
| 46 | |
| 47 | |
| 48 | static ssize_t dgrp_class_register_with_sysfs_show(struct device *c, |
| 49 | struct device_attribute *attr, |
| 50 | char *buf) |
| 51 | { |
| 52 | return snprintf(buf, PAGE_SIZE, "1\n"); |
| 53 | } |
| 54 | static DEVICE_ATTR(register_with_sysfs, 0400, |
| 55 | dgrp_class_register_with_sysfs_show, NULL); |
| 56 | |
| 57 | |
| 58 | static ssize_t dgrp_class_rawreadok_show(struct device *c, |
| 59 | struct device_attribute *attr, |
| 60 | char *buf) |
| 61 | { |
| 62 | return snprintf(buf, PAGE_SIZE, "%d\n", dgrp_rawreadok); |
| 63 | } |
| 64 | static ssize_t dgrp_class_rawreadok_store(struct device *c, |
| 65 | struct device_attribute *attr, |
| 66 | const char *buf, size_t count) |
| 67 | { |
| 68 | sscanf(buf, "0x%x\n", &dgrp_rawreadok); |
| 69 | return count; |
| 70 | } |
| 71 | static DEVICE_ATTR(rawreadok, 0600, dgrp_class_rawreadok_show, |
| 72 | dgrp_class_rawreadok_store); |
| 73 | |
| 74 | |
| 75 | static ssize_t dgrp_class_pollrate_show(struct device *c, |
| 76 | struct device_attribute *attr, |
| 77 | char *buf) |
| 78 | { |
| 79 | return snprintf(buf, PAGE_SIZE, "%d\n", dgrp_poll_tick); |
| 80 | } |
| 81 | |
| 82 | static ssize_t dgrp_class_pollrate_store(struct device *c, |
| 83 | struct device_attribute *attr, |
| 84 | const char *buf, size_t count) |
| 85 | { |
| 86 | sscanf(buf, "0x%x\n", &dgrp_poll_tick); |
| 87 | return count; |
| 88 | } |
| 89 | static DEVICE_ATTR(pollrate, 0600, dgrp_class_pollrate_show, |
| 90 | dgrp_class_pollrate_store); |
| 91 | |
| 92 | static struct attribute *dgrp_sysfs_global_settings_entries[] = { |
| 93 | &dev_attr_pollrate.attr, |
| 94 | &dev_attr_rawreadok.attr, |
| 95 | &dev_attr_register_with_sysfs.attr, |
| 96 | NULL |
| 97 | }; |
| 98 | |
| 99 | |
| 100 | static struct attribute_group dgrp_global_settings_attribute_group = { |
| 101 | .name = NULL, |
| 102 | .attrs = dgrp_sysfs_global_settings_entries, |
| 103 | }; |
| 104 | |
| 105 | |
| 106 | |
| 107 | void dgrp_create_class_sysfs_files(void) |
| 108 | { |
| 109 | int ret = 0; |
| 110 | int max_majors = 1U << (32 - MINORBITS); |
| 111 | |
| 112 | dgrp_class = class_create(THIS_MODULE, "digi_realport"); |
| 113 | ret = class_create_file(dgrp_class, &class_attr_driver_version); |
| 114 | |
| 115 | dgrp_class_global_settings_dev = device_create(dgrp_class, NULL, |
| 116 | MKDEV(0, max_majors + 1), NULL, "driver_settings"); |
| 117 | |
| 118 | ret = sysfs_create_group(&dgrp_class_global_settings_dev->kobj, |
| 119 | &dgrp_global_settings_attribute_group); |
| 120 | if (ret) { |
| 121 | pr_alert("%s: failed to create sysfs global settings device attributes.\n", |
| 122 | __func__); |
| 123 | sysfs_remove_group(&dgrp_class_global_settings_dev->kobj, |
| 124 | &dgrp_global_settings_attribute_group); |
| 125 | return; |
| 126 | } |
| 127 | |
| 128 | dgrp_class_nodes_dev = device_create(dgrp_class, NULL, |
| 129 | MKDEV(0, max_majors + 2), NULL, "nodes"); |
| 130 | |
| 131 | } |
| 132 | |
| 133 | |
| 134 | void dgrp_remove_class_sysfs_files(void) |
| 135 | { |
| 136 | struct nd_struct *nd; |
| 137 | int max_majors = 1U << (32 - MINORBITS); |
| 138 | |
| 139 | list_for_each_entry(nd, &nd_struct_list, list) |
| 140 | dgrp_remove_node_class_sysfs_files(nd); |
| 141 | |
| 142 | sysfs_remove_group(&dgrp_class_global_settings_dev->kobj, |
| 143 | &dgrp_global_settings_attribute_group); |
| 144 | |
| 145 | class_remove_file(dgrp_class, &class_attr_driver_version); |
| 146 | |
| 147 | device_destroy(dgrp_class, MKDEV(0, max_majors + 1)); |
| 148 | device_destroy(dgrp_class, MKDEV(0, max_majors + 2)); |
| 149 | class_destroy(dgrp_class); |
| 150 | } |
| 151 | |
| 152 | static ssize_t dgrp_node_state_show(struct device *c, |
| 153 | struct device_attribute *attr, char *buf) |
| 154 | { |
| 155 | struct nd_struct *nd; |
| 156 | |
| 157 | if (!c) |
| 158 | return 0; |
| 159 | nd = (struct nd_struct *) dev_get_drvdata(c); |
| 160 | if (!nd) |
| 161 | return 0; |
| 162 | |
| 163 | return snprintf(buf, PAGE_SIZE, "%s\n", ND_STATE_STR(nd->nd_state)); |
| 164 | } |
| 165 | |
| 166 | static DEVICE_ATTR(state, 0600, dgrp_node_state_show, NULL); |
| 167 | |
| 168 | static ssize_t dgrp_node_description_show(struct device *c, |
| 169 | struct device_attribute *attr, |
| 170 | char *buf) |
| 171 | { |
| 172 | struct nd_struct *nd; |
| 173 | |
| 174 | if (!c) |
| 175 | return 0; |
| 176 | nd = (struct nd_struct *) dev_get_drvdata(c); |
| 177 | if (!nd) |
| 178 | return 0; |
| 179 | |
| 180 | if (nd->nd_state == NS_READY && nd->nd_ps_desc) |
| 181 | return snprintf(buf, PAGE_SIZE, "%s\n", nd->nd_ps_desc); |
| 182 | return 0; |
| 183 | } |
| 184 | static DEVICE_ATTR(description_info, 0600, dgrp_node_description_show, NULL); |
| 185 | |
| 186 | static ssize_t dgrp_node_hw_version_show(struct device *c, |
| 187 | struct device_attribute *attr, |
| 188 | char *buf) |
| 189 | { |
| 190 | struct nd_struct *nd; |
| 191 | |
| 192 | if (!c) |
| 193 | return 0; |
| 194 | nd = (struct nd_struct *) dev_get_drvdata(c); |
| 195 | if (!nd) |
| 196 | return 0; |
| 197 | |
| 198 | if (nd->nd_state == NS_READY) |
| 199 | return snprintf(buf, PAGE_SIZE, "%d.%d\n", |
| 200 | (nd->nd_hw_ver >> 8) & 0xff, |
| 201 | nd->nd_hw_ver & 0xff); |
| 202 | |
| 203 | return 0; |
| 204 | } |
| 205 | static DEVICE_ATTR(hw_version_info, 0600, dgrp_node_hw_version_show, NULL); |
| 206 | |
| 207 | static ssize_t dgrp_node_hw_id_show(struct device *c, |
| 208 | struct device_attribute *attr, char *buf) |
| 209 | { |
| 210 | struct nd_struct *nd; |
| 211 | |
| 212 | if (!c) |
| 213 | return 0; |
| 214 | nd = (struct nd_struct *) dev_get_drvdata(c); |
| 215 | if (!nd) |
| 216 | return 0; |
| 217 | |
| 218 | |
| 219 | if (nd->nd_state == NS_READY) |
| 220 | return snprintf(buf, PAGE_SIZE, "%d\n", nd->nd_hw_id); |
| 221 | return 0; |
| 222 | } |
| 223 | static DEVICE_ATTR(hw_id_info, 0600, dgrp_node_hw_id_show, NULL); |
| 224 | |
| 225 | static ssize_t dgrp_node_sw_version_show(struct device *c, |
| 226 | struct device_attribute *attr, |
| 227 | char *buf) |
| 228 | { |
| 229 | struct nd_struct *nd; |
| 230 | |
| 231 | if (!c) |
| 232 | return 0; |
| 233 | |
| 234 | nd = (struct nd_struct *) dev_get_drvdata(c); |
| 235 | if (!nd) |
| 236 | return 0; |
| 237 | |
| 238 | if (nd->nd_state == NS_READY) |
| 239 | return snprintf(buf, PAGE_SIZE, "%d.%d\n", |
| 240 | (nd->nd_sw_ver >> 8) & 0xff, |
| 241 | nd->nd_sw_ver & 0xff); |
| 242 | |
| 243 | return 0; |
| 244 | } |
| 245 | static DEVICE_ATTR(sw_version_info, 0600, dgrp_node_sw_version_show, NULL); |
| 246 | |
| 247 | |
| 248 | static struct attribute *dgrp_sysfs_node_entries[] = { |
| 249 | &dev_attr_state.attr, |
| 250 | &dev_attr_description_info.attr, |
| 251 | &dev_attr_hw_version_info.attr, |
| 252 | &dev_attr_hw_id_info.attr, |
| 253 | &dev_attr_sw_version_info.attr, |
| 254 | NULL |
| 255 | }; |
| 256 | |
| 257 | |
| 258 | static struct attribute_group dgrp_node_attribute_group = { |
| 259 | .name = NULL, |
| 260 | .attrs = dgrp_sysfs_node_entries, |
| 261 | }; |
| 262 | |
| 263 | |
| 264 | void dgrp_create_node_class_sysfs_files(struct nd_struct *nd) |
| 265 | { |
| 266 | int ret; |
| 267 | char name[10]; |
| 268 | |
| 269 | if (nd->nd_ID) |
| 270 | ID_TO_CHAR(nd->nd_ID, name); |
| 271 | else |
| 272 | sprintf(name, "node%ld", nd->nd_major); |
| 273 | |
| 274 | nd->nd_class_dev = device_create(dgrp_class, dgrp_class_nodes_dev, |
| 275 | MKDEV(0, nd->nd_major), NULL, name); |
| 276 | |
| 277 | ret = sysfs_create_group(&nd->nd_class_dev->kobj, |
| 278 | &dgrp_node_attribute_group); |
| 279 | |
| 280 | if (ret) { |
| 281 | pr_alert("%s: failed to create sysfs node device attributes.\n", |
| 282 | __func__); |
| 283 | sysfs_remove_group(&nd->nd_class_dev->kobj, |
| 284 | &dgrp_node_attribute_group); |
| 285 | return; |
| 286 | } |
| 287 | |
| 288 | dev_set_drvdata(nd->nd_class_dev, nd); |
| 289 | |
| 290 | } |
| 291 | |
| 292 | |
| 293 | void dgrp_remove_node_class_sysfs_files(struct nd_struct *nd) |
| 294 | { |
| 295 | if (nd->nd_class_dev) { |
| 296 | sysfs_remove_group(&nd->nd_class_dev->kobj, |
| 297 | &dgrp_node_attribute_group); |
| 298 | |
| 299 | device_destroy(dgrp_class, MKDEV(0, nd->nd_major)); |
| 300 | nd->nd_class_dev = NULL; |
| 301 | } |
| 302 | } |
| 303 | |
| 304 | |
| 305 | |
| 306 | static ssize_t dgrp_tty_state_show(struct device *d, |
| 307 | struct device_attribute *attr, char *buf) |
| 308 | { |
| 309 | struct un_struct *un; |
| 310 | |
| 311 | if (!d) |
| 312 | return 0; |
| 313 | un = (struct un_struct *) dev_get_drvdata(d); |
| 314 | if (!un) |
| 315 | return 0; |
| 316 | |
| 317 | return snprintf(buf, PAGE_SIZE, "%s\n", |
| 318 | un->un_open_count ? "Open" : "Closed"); |
| 319 | } |
| 320 | static DEVICE_ATTR(state_info, 0600, dgrp_tty_state_show, NULL); |
| 321 | |
| 322 | static ssize_t dgrp_tty_baud_show(struct device *d, |
| 323 | struct device_attribute *attr, char *buf) |
| 324 | { |
| 325 | struct ch_struct *ch; |
| 326 | struct un_struct *un; |
| 327 | |
| 328 | if (!d) |
| 329 | return 0; |
| 330 | un = (struct un_struct *) dev_get_drvdata(d); |
| 331 | if (!un) |
| 332 | return 0; |
| 333 | ch = un->un_ch; |
| 334 | if (!ch) |
| 335 | return 0; |
| 336 | return snprintf(buf, PAGE_SIZE, "%d\n", |
| 337 | un->un_open_count ? (PORTSERVER_DIVIDEND / ch->ch_s_brate) : 0); |
| 338 | } |
| 339 | static DEVICE_ATTR(baud_info, 0400, dgrp_tty_baud_show, NULL); |
| 340 | |
| 341 | |
| 342 | static ssize_t dgrp_tty_msignals_show(struct device *d, |
| 343 | struct device_attribute *attr, char *buf) |
| 344 | { |
| 345 | struct ch_struct *ch; |
| 346 | struct un_struct *un; |
| 347 | |
| 348 | if (!d) |
| 349 | return 0; |
| 350 | un = (struct un_struct *) dev_get_drvdata(d); |
| 351 | if (!un) |
| 352 | return 0; |
| 353 | ch = un->un_ch; |
| 354 | if (!ch) |
| 355 | return 0; |
| 356 | |
| 357 | if (ch->ch_open_count) { |
| 358 | return snprintf(buf, PAGE_SIZE, "%s %s %s %s %s %s\n", |
| 359 | (ch->ch_s_mlast & DM_RTS) ? "RTS" : "", |
| 360 | (ch->ch_s_mlast & DM_CTS) ? "CTS" : "", |
| 361 | (ch->ch_s_mlast & DM_DTR) ? "DTR" : "", |
| 362 | (ch->ch_s_mlast & DM_DSR) ? "DSR" : "", |
| 363 | (ch->ch_s_mlast & DM_CD) ? "DCD" : "", |
| 364 | (ch->ch_s_mlast & DM_RI) ? "RI" : ""); |
| 365 | } |
| 366 | return 0; |
| 367 | } |
| 368 | static DEVICE_ATTR(msignals_info, 0400, dgrp_tty_msignals_show, NULL); |
| 369 | |
| 370 | |
| 371 | static ssize_t dgrp_tty_iflag_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_iflag); |
| 386 | } |
| 387 | static DEVICE_ATTR(iflag_info, 0600, dgrp_tty_iflag_show, NULL); |
| 388 | |
| 389 | |
| 390 | static ssize_t dgrp_tty_cflag_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_cflag); |
| 405 | } |
| 406 | static DEVICE_ATTR(cflag_info, 0600, dgrp_tty_cflag_show, NULL); |
| 407 | |
| 408 | |
| 409 | static ssize_t dgrp_tty_oflag_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_s_oflag); |
| 424 | } |
| 425 | static DEVICE_ATTR(oflag_info, 0600, dgrp_tty_oflag_show, NULL); |
| 426 | |
| 427 | |
| 428 | static ssize_t dgrp_tty_digi_flag_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, "%x\n", ch->ch_digi.digi_flags); |
| 443 | } |
| 444 | static DEVICE_ATTR(digi_flag_info, 0600, dgrp_tty_digi_flag_show, NULL); |
| 445 | |
| 446 | |
| 447 | static ssize_t dgrp_tty_rxcount_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_rxcount); |
| 462 | } |
| 463 | static DEVICE_ATTR(rxcount_info, 0600, dgrp_tty_rxcount_show, NULL); |
| 464 | |
| 465 | |
| 466 | static ssize_t dgrp_tty_txcount_show(struct device *d, |
| 467 | struct device_attribute *attr, char *buf) |
| 468 | { |
| 469 | struct ch_struct *ch; |
| 470 | struct un_struct *un; |
| 471 | |
| 472 | if (!d) |
| 473 | return 0; |
| 474 | un = (struct un_struct *) dev_get_drvdata(d); |
| 475 | if (!un) |
| 476 | return 0; |
| 477 | ch = un->un_ch; |
| 478 | if (!ch) |
| 479 | return 0; |
| 480 | return snprintf(buf, PAGE_SIZE, "%d\n", ch->ch_txcount); |
| 481 | } |
| 482 | static DEVICE_ATTR(txcount_info, 0600, dgrp_tty_txcount_show, NULL); |
| 483 | |
| 484 | |
| 485 | static ssize_t dgrp_tty_name_show(struct device *d, |
| 486 | struct device_attribute *attr, char *buf) |
| 487 | { |
| 488 | struct nd_struct *nd; |
| 489 | struct ch_struct *ch; |
| 490 | struct un_struct *un; |
| 491 | char name[10]; |
| 492 | |
| 493 | if (!d) |
| 494 | return 0; |
| 495 | un = (struct un_struct *) dev_get_drvdata(d); |
| 496 | if (!un) |
| 497 | return 0; |
| 498 | ch = un->un_ch; |
| 499 | if (!ch) |
| 500 | return 0; |
| 501 | nd = ch->ch_nd; |
| 502 | if (!nd) |
| 503 | return 0; |
| 504 | |
| 505 | ID_TO_CHAR(nd->nd_ID, name); |
| 506 | |
| 507 | return snprintf(buf, PAGE_SIZE, "%s%s%02d\n", |
| 508 | un->un_type == SERIAL_TYPE_XPRINT ? "pr" : "tty", |
| 509 | name, ch->ch_portnum); |
| 510 | } |
| 511 | static DEVICE_ATTR(custom_name, 0600, dgrp_tty_name_show, NULL); |
| 512 | |
| 513 | |
| 514 | static struct attribute *dgrp_sysfs_tty_entries[] = { |
| 515 | &dev_attr_state_info.attr, |
| 516 | &dev_attr_baud_info.attr, |
| 517 | &dev_attr_msignals_info.attr, |
| 518 | &dev_attr_iflag_info.attr, |
| 519 | &dev_attr_cflag_info.attr, |
| 520 | &dev_attr_oflag_info.attr, |
| 521 | &dev_attr_digi_flag_info.attr, |
| 522 | &dev_attr_rxcount_info.attr, |
| 523 | &dev_attr_txcount_info.attr, |
| 524 | &dev_attr_custom_name.attr, |
| 525 | NULL |
| 526 | }; |
| 527 | |
| 528 | |
| 529 | static struct attribute_group dgrp_tty_attribute_group = { |
| 530 | .name = NULL, |
| 531 | .attrs = dgrp_sysfs_tty_entries, |
| 532 | }; |
| 533 | |
| 534 | |
| 535 | void dgrp_create_tty_sysfs(struct un_struct *un, struct device *c) |
| 536 | { |
| 537 | int ret; |
| 538 | |
| 539 | ret = sysfs_create_group(&c->kobj, &dgrp_tty_attribute_group); |
| 540 | if (ret) { |
| 541 | pr_alert("%s: failed to create sysfs tty device attributes.\n", |
| 542 | __func__); |
| 543 | sysfs_remove_group(&c->kobj, &dgrp_tty_attribute_group); |
| 544 | return; |
| 545 | } |
| 546 | |
| 547 | dev_set_drvdata(c, un); |
| 548 | |
| 549 | } |
| 550 | |
| 551 | |
| 552 | void dgrp_remove_tty_sysfs(struct device *c) |
| 553 | { |
| 554 | sysfs_remove_group(&c->kobj, &dgrp_tty_attribute_group); |
| 555 | } |