lincan/src/main.c

   1 /**************************************************************************/
   2 /* File: main.c - the CAN driver top level glue code (needs rewrite)      */
   3 /*                                                                        */
   4 /* LinCAN - (Not only) Linux CAN bus driver                               */
   5 /* Copyright (C) 2002-2009 DCE FEE CTU Prague <http://dce.felk.cvut.cz>   */
   6 /* Copyright (C) 2002-2009 Pavel Pisa <pisa@cmp.felk.cvut.cz>             */
   7 /* Funded by OCERA and FRESCOR IST projects                               */
   8 /* Based on CAN driver code by Arnaud Westenberg <arnaud@wanadoo.nl>      */
   9 /*                                                                        */
  10 /* LinCAN is free software; you can redistribute it and/or modify it      */
  11 /* under terms of the GNU General Public License as published by the      */
  12 /* Free Software Foundation; either version 2, or (at your option) any    */
  13 /* later version.  LinCAN is distributed in the hope that it will be      */
  14 /* useful, but WITHOUT ANY WARRANTY; without even the implied warranty    */
  15 /* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU    */
  16 /* General Public License for more details. You should have received a    */
  17 /* copy of the GNU General Public License along with LinCAN; see file     */
  18 /* COPYING. If not, write to the Free Software Foundation, 675 Mass Ave,  */
  19 /* Cambridge, MA 02139, USA.                                              */
  20 /*                                                                        */
  21 /* To allow use of LinCAN in the compact embedded systems firmware        */
  22 /* and RT-executives (RTEMS for example), main authors agree with next    */
  23 /* special exception:                                                     */
  24 /*                                                                        */
  25 /* Including LinCAN header files in a file, instantiating LinCAN generics */
  26 /* or templates, or linking other files with LinCAN objects to produce    */
  27 /* an application image/executable, does not by itself cause the          */
  28 /* resulting application image/executable to be covered by                */
  29 /* the GNU General Public License.                                        */
  30 /* This exception does not however invalidate any other reasons           */
  31 /* why the executable file might be covered by the GNU Public License.    */
  32 /* Publication of enhanced or derived LinCAN files is required although.  */
  33 /**************************************************************************/
  34
  35 #ifndef EXPORT_SYMTAB
  36 #define EXPORT_SYMTAB
  37 #endif
  38
  39 #include <linux/module.h>
  40
  41 #include <linux/kernel.h>
  42 #include <linux/fs.h>
  43 #include <linux/sched.h>
  44 #include <linux/poll.h>
  45 #include <linux/version.h>
  46 #include <linux/interrupt.h>
  47
  48 #if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,0))
  49  #include <linux/autoconf.h>
  50  #include <linux/wrapper.h>
  51 #else
  52  #include <linux/device.h>
  53  #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,13)
  54   static struct class *can_class;
  55  #elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
  56   static struct class_simple *can_class;
  57   #define class_create class_simple_create
  58   #define class_device_create class_simple_device_add
  59   #define class_device_destroy(a,b) class_simple_device_remove(b)
  60   #define class_destroy class_simple_destroy
  61  #endif
  62 #endif
  63
  64 #if !defined (__GENKSYMS__)
  65 #if (defined (MODVERSIONS) && !defined(NOVER))
  66 #include <linux/modversions.h>
  67 /*#include "../include/main.ver"*/
  68 #endif
  69 #endif
  70
  71 /*#undef CONFIG_DEVFS_FS*/
  72
  73 #ifdef CONFIG_DEVFS_FS
  74 #include <linux/devfs_fs_kernel.h>
  75 #include <linux/miscdevice.h>
  76 #endif
  77
  78 #include "../include/can.h"
  79 #include "../include/can_sysdep.h"
  80 #include "../include/main.h"
  81 #include "../include/modparms.h"
  82 #include "../include/devcommon.h"
  83 #include "../include/setup.h"
  84 #include "../include/proc.h"
  85 #include "../include/open.h"
  86 #include "../include/close.h"
  87 #include "../include/read.h"
  88 #include "../include/select.h"
  89 #include "../include/irq.h"
  90 #include "../include/ioctl.h"
  91 #include "../include/write.h"
  92 #include "../include/finish.h"
  93 #include "../include/fasync.h"
  94
  95 #ifdef CAN_WITH_RTL
  96 #include <rtl_posixio.h>
  97 #include "../include/can_iortl.h"
  98 #endif /*CAN_WITH_RTL*/
  99
 100 #if defined(CONFIG_OC_LINCAN_CARD_usbcan)
 101         #include "../include/usbcan.h"
 102 #endif
 103
 104 can_spinlock_t canuser_manipulation_lock;
 105
 106 int major=CAN_MAJOR;
 107 int minor[MAX_TOT_CHIPS]={-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1};
 108 int extended=0;
 109 int pelican=0;
 110 int baudrate[MAX_TOT_CHIPS];
 111 char *hw[MAX_HW_CARDS]={NULL,};
 112 int irq[MAX_IRQ]={-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1};
 113 unsigned long io[MAX_HW_CARDS]={-1,-1,-1,-1,-1,-1,-1,-1};
 114 long clockfreq[MAX_HW_CARDS];
 115 int stdmask=0;
 116 int extmask=0;
 117 int mo15mask=0;
 118 int processlocal=0;
 119
 120 unsigned int minor_specified;
 121 unsigned int baudrate_specified;
 122 unsigned int hw_specified;
 123 unsigned int irq_specified;
 124 unsigned int io_specified;
 125 unsigned int clockfreq_specified;
 126
 127 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,12))
 128 /* Module parameters, some must be supplied at module loading time */
 129 MODULE_PARM(major,"1i");
 130 /*MODULE_PARM(minor, "1-" __MODULE_STRING(MAX_TOT_CHIPS)"i");*/
 131 MODULE_PARM(minor, "1-" __MODULE_STRING(MAX_TOT_CHIPS_STR)"i");
 132 MODULE_PARM(extended,"1i");
 133 MODULE_PARM(pelican,"1i");
 134 MODULE_PARM(baudrate, "1-" __MODULE_STRING(MAX_TOT_CHIPS_STR)"i");
 135 MODULE_PARM(hw, "1-" __MODULE_STRING(MAX_HW_CARDS)"s");
 136 MODULE_PARM(irq, "1-" __MODULE_STRING(MAX_IRQ)"i");
 137 MODULE_PARM(io, "1-" __MODULE_STRING(MAX_HW_CARDS)"i");
 138 MODULE_PARM(clockfreq, "1-" __MODULE_STRING(MAX_HW_CARDS)"i");
 139 MODULE_PARM(stdmask, "1i");
 140 MODULE_PARM(extmask, "1i");
 141 MODULE_PARM(mo15mask, "1i");
 142 MODULE_PARM(processlocal, "1i");
 143
 144 #else /* LINUX_VERSION_CODE >= 2,6,12 */
 145 module_param(major, int, 0);
 146 module_param_array(minor, int, &minor_specified, 0);
 147 module_param(extended, int, 0);
 148 module_param(pelican, int, 0);
 149 module_param_array(baudrate, int, &baudrate_specified, 0);
 150 module_param_array(hw, charp, &hw_specified, 0);
 151 module_param_array(irq, int, &irq_specified, 0);
 152 module_param_array(io, ulong, &io_specified, 0);
 153 module_param_array(clockfreq, long, &clockfreq_specified, 0);
 154 module_param(stdmask, int, 0);
 155 module_param(extmask, int, 0);
 156 module_param(mo15mask, int, 0);
 157 module_param(processlocal, int, 0);
 158 #endif /* LINUX_VERSION_CODE >= 2,6,12 */
 159
 160 MODULE_PARM_DESC(major,"can be used to change default major [" __MODULE_STRING(CAN_MAJOR) "]");
 161 MODULE_PARM_DESC(minor,"can be used to change default starting minor for each channel");
 162 MODULE_PARM_DESC(extended,"enables automatic switching to extended format if ID>2047,"
 163                         " selects extended frames reception for i82527");
 164 MODULE_PARM_DESC(pelican,"unused parameter, PeliCAN used by default for sja1000p chips");
 165 MODULE_PARM_DESC(baudrate,"baudrate for each channel in step of 1kHz");
 166 MODULE_PARM_DESC(hw,"list of boards types to initialize - virtual,pip5,...");
 167 MODULE_PARM_DESC(irq,"list of iterrupt signal numbers, most ISA has one per chip, no value for PCI or virtual");
 168 MODULE_PARM_DESC(io,"IO address for each board, use 0 for PCI or virtual");
 169 MODULE_PARM_DESC(clockfreq,"base board clock source frequency in step of 1kHz");
 170 MODULE_PARM_DESC(stdmask,"default standard mask for i82527 chips");
 171 MODULE_PARM_DESC(extmask,"default extended mask for i82527 chips");
 172 MODULE_PARM_DESC(mo15mask,"mask for communication object 15 of i82527 chips");
 173 MODULE_PARM_DESC(processlocal,"select postprocessing/loopback of transmitted messages - "
 174                 "0 .. disabled, 1 .. can be enabled by FIFO filter, 2 .. enabled by default");
 175
 176 #ifdef CAN_WITH_RTL
 177 int can_rtl_priority=-1;
 178 MODULE_PARM(can_rtl_priority, "1i");
 179 MODULE_PARM_DESC(can_rtl_priority,"select priority of chip worker thread");
 180 #endif /*CAN_WITH_RTL*/
 181
 182 /* Other module attributes */
 183 #ifdef MODULE_SUPPORTED_DEVICE
 184 MODULE_SUPPORTED_DEVICE("can");
 185 #endif
 186 #ifdef MODULE_LICENSE
 187 MODULE_LICENSE("GPL");
 188 #endif
 189 #ifdef MODULE_DESCRIPTION
 190 MODULE_DESCRIPTION("Universal Linux CAN-bus device driver");
 191 #endif
 192 #ifdef MODULE_AUTHOR
 193 MODULE_AUTHOR("Pavel Pisa <pisa@cmp.felk.cvut.cz>, Arnaud Westenberg");
 194 #endif
 195
 196 /* Global structures, used to describe the installed hardware. */
 197 struct canhardware_t canhardware;
 198 struct canhardware_t *hardware_p=&canhardware;
 199 struct canchip_t *chips_p[MAX_TOT_CHIPS];
 200 struct msgobj_t *objects_p[MAX_TOT_MSGOBJS];
 201 #ifdef CONFIG_DEVFS_FS
 202 #if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,0))
 203 devfs_handle_t  devfs_handles[MAX_TOT_MSGOBJS];
 204 #endif
 205 #endif
 206
 207 /* Pointers to dynamically allocated memory are maintained in a linked list
 208  * to ease memory deallocation.
 209  */
 210 struct mem_addr *mem_head=NULL;
 211
 212 struct file_operations can_fops=
 213 {
 214  #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0))
 215         owner:          THIS_MODULE,
 216  #endif
 217         read:           can_read,
 218         write:          can_write,
 219         poll:           can_poll,
 220         ioctl:          can_ioctl,
 221         open:           can_open,
 222         release:        can_close,
 223   #ifdef CAN_ENABLE_KERN_FASYNC
 224         fasync:         can_fasync
 225   #endif /*CAN_ENABLE_KERN_FASYNC*/
 226 };
 227
 228 EXPORT_SYMBOL(can_fops);
 229
 230
 231 #ifdef CAN_WITH_RTL
 232 struct rtl_file_operations can_fops_rtl = {
 233         llseek:         NULL,
 234         read:           can_read_rtl_posix,
 235         write:          can_write_rtl_posix,
 236         ioctl:          can_ioctl_rtl_posix,
 237         mmap:           NULL,
 238         open:           can_open_rtl_posix,
 239         release:        can_release_rtl_posix
 240 };
 241 #endif /*CAN_WITH_RTL*/
 242
 243
 244 /*
 245  2.6 kernel attributes for sysfs
 246
 247 static ssize_t show_xxx(struct class_device *cdev, char *buf)
 248 {
 249         return sprintf(buf, "xxxx\n");
 250 }
 251
 252 static ssize_t store_xxx(struct class_device *cdev, const char * buf, size_t count)
 253 {
 254 }
 255
 256 static CLASS_DEVICE_ATTR(xxx, S_IRUGO, show_xxx, store_xxx/NULL);
 257
 258 ret = class_device_create_file(class_dev, class_device_attr_xxx);
 259 if (ret)
 260         goto err_unregister;
 261
 262 */
 263
 264 int init_module(void)
 265 {
 266         int res=0,i=0, j;
 267         struct candevice_t *candev;
 268         struct canchip_t *chip;
 269
 270         if (parse_mod_parms())
 271                 return -EINVAL;
 272
 273         can_spin_lock_init(&canuser_manipulation_lock);
 274         canqueue_kern_initialize();
 275
 276         if (init_hw_struct())
 277                 return -ENODEV;
 278
 279         #ifdef CAN_DEBUG
 280                 list_hw();
 281         #endif
 282
 283         res=register_chrdev(major,DEVICE_NAME, &can_fops);
 284         if (res<0) {
 285                 CANMSG("Error registering driver.\n");
 286                 goto register_error;
 287         }
 288
 289         #ifdef CAN_WITH_RTL
 290         can_spin_lock_init(&can_irq_manipulation_lock);
 291         canqueue_rtl_initialize();
 292         res=rtl_register_rtldev(major,DEVICE_NAME,&can_fops_rtl);
 293         if (res<0) {
 294                 CANMSG("Error registering RT-Linux major number.\n");
 295                 goto rtldev_error;
 296         }
 297         #endif /*CAN_WITH_RTL*/
 298
 299         for (i=0; i<hardware_p->nr_boards; i++) {
 300                 candev=hardware_p->candevice[i];
 301                 if (candev->hwspecops->request_io(candev))
 302                         goto request_io_error;
 303                 candev->flags|=CANDEV_IO_RESERVED;
 304         }
 305
 306         for (i=0; i<hardware_p->nr_boards; i++) {
 307                 candev=hardware_p->candevice[i];
 308                 if (candev->hwspecops->reset(candev))
 309                         goto reset_error;
 310         }
 311
 312         can_spin_lock_init(&hardware_p->rtr_lock);
 313         hardware_p->rtr_queue=NULL;
 314
 315         for (i=0; i<hardware_p->nr_boards; i++) {
 316                 candev=hardware_p->candevice[i];
 317                 for(j=0; j<candev->nr_all_chips; j++) {
 318                         if((chip=candev->chip[j])==NULL)
 319                                 continue;
 320
 321                         if(chip->chipspecops->attach_to_chip(chip)<0) {
 322                                 CANMSG("Initial attach to the chip HW failed\n");
 323                                 goto interrupt_error;
 324                         }
 325
 326                         chip->flags |= CHIP_ATTACHED;
 327
 328                         if(can_chip_setup_irq(chip)<0) {
 329                                 CANMSG("Error to setup chip IRQ\n");
 330                                 goto interrupt_error;
 331                         }
 332                 }
 333
 334                 if (candev->flags & CANDEV_PROGRAMMABLE_IRQ)
 335                         if (candev->hwspecops->program_irq(candev)){
 336                                 CANMSG("Error to program board interrupt\n");
 337                                 goto interrupt_error;
 338                         }
 339         }
 340
 341 #ifdef CONFIG_PROC_FS
 342         if (can_init_procdir())
 343                 goto proc_error;
 344 #endif
 345
 346 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0))
 347         can_class=class_create(THIS_MODULE, "can");
 348 #endif
 349
 350 #if defined(CONFIG_DEVFS_FS) || (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0))
 351         {
 352             #if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,0))
 353                 char dev_name[32];
 354             #elif  LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,25) /* >= 2.6.15 */
 355                 struct class_device *this_dev;
 356             #else
 357                 struct device *this_dev;
 358             #endif
 359                 int dev_minor;
 360                 for(i=0;i<MAX_TOT_MSGOBJS;i++) {
 361                         if(!objects_p[i]) continue;
 362                         dev_minor=objects_p[i]->minor;
 363                     #if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,0))
 364                         sprintf (dev_name, "can%d", dev_minor);
 365                         devfs_handles[i]=devfs_register(NULL, dev_name,
 366                                 DEVFS_FL_DEFAULT, major, dev_minor,
 367                                 S_IFCHR | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP,
 368                                 &can_fops, (void*)objects_p[i]);
 369                     #else
 370                       #if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,14))
 371                         this_dev=class_device_create(can_class, MKDEV(major, dev_minor), NULL,  "can%d", dev_minor);
 372                       #elif  LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,25) /* >= 2.6.15 */
 373                         this_dev=class_device_create(can_class, NULL, MKDEV(major, dev_minor), NULL,  "can%d", dev_minor);
 374                       #elif  LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,27)
 375                         this_dev=device_create_drvdata(can_class, NULL, MKDEV(major, dev_minor), objects_p[i],  "can%d", dev_minor);
 376                       #else /* >= 2.6.28 */
 377                         this_dev=device_create(can_class, NULL, MKDEV(major, dev_minor), objects_p[i],  "can%d", dev_minor);
 378                       #endif /* >= 2.6.28 */
 379                         if(IS_ERR(this_dev)){
 380                                 CANMSG("problem to create device \"can%d\" in the class \"can\"\n", dev_minor);
 381                       #if  LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,25)
 382                         }else{
 383                                 /*this_dev->class_data=objects_p[i];*/
 384                                 class_set_devdata(this_dev,objects_p[i]);
 385                       #endif /* <= 2.6.25 */
 386                         }
 387                       #ifdef CONFIG_DEVFS_FS
 388                         devfs_mk_cdev(MKDEV(major, dev_minor), S_IFCHR | S_IRUGO | S_IWUGO, "can%d", dev_minor);
 389                       #endif
 390                     #endif
 391                 }
 392         }
 393 #endif
 394
 395 #if defined(CONFIG_OC_LINCAN_CARD_usbcan)
 396         res = usbcan_init();
 397         if (res){
 398                 CANMSG("usb_register for usbcan failed. Error number %d.\n", res);
 399                 goto memory_error;
 400         }
 401 #endif
 402
 403         return 0;
 404
 405 #ifdef CONFIG_PROC_FS
 406         proc_error: ;
 407                 CANMSG("Error registering /proc entry.\n");
 408                 goto memory_error;
 409 #endif
 410
 411         interrupt_error: ;
 412                 goto memory_error;
 413
 414         reset_error: ;
 415                 CANMSG("Error resetting device.\n");
 416                 goto memory_error;
 417
 418         request_io_error: ;
 419                 CANMSG("Error to request IO resources for device.\n");
 420                 goto memory_error;
 421
 422         memory_error: ;
 423                 canhardware_done(hardware_p);
 424
 425                 #ifdef CAN_WITH_RTL
 426                 rtl_unregister_rtldev(major,DEVICE_NAME);
 427         rtldev_error:
 428                 canqueue_rtl_done();
 429                 #endif /*CAN_WITH_RTL*/
 430
 431                 unregister_chrdev(major,DEVICE_NAME);
 432                 CANMSG("No CAN devices or driver setup error.\n");
 433
 434         register_error:
 435                 if ( can_del_mem_list() )
 436                         CANMSG("Error deallocating memory\n");
 437
 438                 return -ENODEV;
 439 }
 440
 441
 442
 443
 444 struct candevice_t* register_hotplug_dev(const char *hwname,int (*chipdataregfnc)(struct canchip_t *ch,void *data),void *devdata){
 445         int i=0, j, board=0;
 446         struct candevice_t *candev;
 447         struct canchip_t *chip;
 448         struct boardtype_t *brp;
 449
 450         while ( (hw[board] != NULL) && (board < MAX_HW_CARDS) )
 451                 board++;
 452         if (board>=MAX_HW_CARDS){
 453                 CANMSG("Maximum number of devices has been reached, no space for new device");
 454                 return NULL;
 455         }
 456         brp = boardtype_find(hwname);
 457         if(!brp) {
 458                 CANMSG("Sorry, hardware \"%s\" is currently not supported.\n",hwname);
 459                 return NULL;
 460         }
 461         if (board==MAX_HW_CARDS){
 462                         CANMSG("Device \"%s\" could not be registered due to internal limits.\n",hwname);
 463                         return NULL;
 464         }
 465         hw[board]=brp->boardtype;
 466
 467         if (init_new_hw_struct(board))
 468                 return NULL;
 469
 470         #ifdef CAN_DEBUG
 471                 list_hw();
 472         #endif
 473
 474         candev=hardware_p->candevice[board];
 475
 476         /* Adding link to usb device structure into can device */
 477         candev->sysdevptr.anydev=devdata;
 478
 479         if (candev->hwspecops->request_io(candev))
 480                 goto request_io_error;
 481         candev->flags|=CANDEV_IO_RESERVED;
 482
 483         if (candev->hwspecops->reset(candev))
 484                 goto reset_error;
 485
 486         for(j=0; j<candev->nr_all_chips; j++) {
 487                 if((chip=candev->chip[j])==NULL)
 488                         continue;
 489
 490                 if (chipdataregfnc && devdata){
 491                         if (chipdataregfnc(chip,devdata))
 492                                 goto interrupt_error;
 493                 }
 494
 495                 if(chip->chipspecops->attach_to_chip(chip)<0) {
 496                         CANMSG("Initial attach to the chip HW failed\n");
 497                         goto interrupt_error;
 498                 }
 499
 500                 chip->flags |= CHIP_ATTACHED;
 501
 502                 if(can_chip_setup_irq(chip)<0) {
 503                         CANMSG("Error to setup chip IRQ\n");
 504                         goto interrupt_error;
 505                 }
 506         }
 507
 508         if (candev->flags & CANDEV_PROGRAMMABLE_IRQ)
 509                 if (candev->hwspecops->program_irq(candev)){
 510                         CANMSG("Error to program board interrupt\n");
 511                         goto interrupt_error;
 512                 }
 513
 514 #ifdef CONFIG_PROC_FS
 515         if (can_init_procentry(board))
 516                 goto proc_error;
 517 #endif
 518
 519 #if defined(CONFIG_DEVFS_FS) || (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0))
 520         {
 521                 #if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,0))
 522                 char dev_name[32];
 523                 #else
 524                 struct class_device *this_dev;
 525                 #endif
 526                 int dev_minor;
 527                 for(i=0;i<MAX_TOT_MSGOBJS;i++) {
 528                         if(!objects_p[i]) continue;
 529                         if(objects_p[i]->hostchip->hostdevice != candev) continue;
 530
 531                         dev_minor=objects_p[i]->minor;
 532                         #if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,0))
 533                         sprintf (dev_name, "can%d", dev_minor);
 534                         devfs_handles[i]=devfs_register(NULL, dev_name,
 535                         DEVFS_FL_DEFAULT, major, dev_minor,
 536                         S_IFCHR | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP,
 537                         &can_fops, (void*)objects_p[i]);
 538                         #else
 539                         #if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,14))
 540                         this_dev=class_device_create(can_class, MKDEV(major, dev_minor), NULL,  "can%d", dev_minor);
 541                         #elif  LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,25) /* >= 2.6.15 */
 542                         this_dev=class_device_create(can_class, NULL, MKDEV(major, dev_minor), NULL,  "can%d", dev_minor);
 543                         #elif  LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,27)
 544                         this_dev=device_create_drvdata(can_class, NULL, MKDEV(major, dev_minor), objects_p[i],  "can%d", dev_minor);
 545                         #else /* >= 2.6.28 */
 546                         this_dev=device_create(can_class, NULL, MKDEV(major, dev_minor), objects_p[i],  "can%d", dev_minor);
 547                         #endif /* >= 2.6.28 */
 548                         if(IS_ERR(this_dev)){
 549                                 CANMSG("problem to create device \"can%d\" in the class \"can\"\n", dev_minor);
 550                       #if  LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,25)
 551                         }else{
 552                                 /*this_dev->class_data=objects_p[i];*/
 553                                 class_set_devdata(this_dev,objects_p[i]);
 554                       #endif /* <= 2.6.25 */
 555                         }
 556                         #ifdef CONFIG_DEVFS_FS
 557                         devfs_mk_cdev(MKDEV(major, dev_minor), S_IFCHR | S_IRUGO | S_IWUGO, "can%d", dev_minor);
 558                         #endif
 559                         #endif
 560                 }
 561         }
 562 #endif
 563         return candev;
 564
 565 #ifdef CONFIG_PROC_FS
 566         proc_error: ;
 567                 CANMSG("Error registering /proc entry.\n");
 568                 goto memory_error;
 569 #endif
 570
 571         interrupt_error: ;
 572                 goto memory_error;
 573
 574         reset_error: ;
 575                 CANMSG("Error resetting device.\n");
 576                 goto memory_error;
 577
 578         request_io_error: ;
 579                 CANMSG("Error to request IO resources for device.\n");
 580                 goto memory_error;
 581
 582         memory_error: ;
 583
 584                 #ifdef CAN_WITH_RTL
 585         rtldev_error:
 586                 #endif /*CAN_WITH_RTL*/
 587
 588 //      register_error:
 589 //              if ( can_del_mem_list() )
 590 //                      CANMSG("Error deallocating memory\n");
 591
 592                 return NULL;
 593 }
 594
 595 void cleanup_hotplug_dev(struct candevice_t *dev)
 596 {
 597         int i=0;
 598         int dev_minor;
 599
 600         if (!dev)
 601                 return;
 602         DEBUGMSG("Cleaning up hotplug device.\n");
 603
 604 #ifdef CONFIG_PROC_FS
 605         if (can_delete_procentry(dev))
 606                 CANMSG("Error unregistering /proc/can entry.\n");
 607 #endif
 608
 609 #if defined(CONFIG_DEVFS_FS) || (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0))
 610         for(i=0;i<MAX_TOT_MSGOBJS;i++) {
 611                 if(!objects_p[i]) continue;
 612                 if(objects_p[i]->hostchip->hostdevice != dev) continue;
 613                 #if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,0))
 614                 if(devfs_handles[i])
 615                         devfs_unregister(devfs_handles[i]);
 616                 #else
 617                 dev_minor=objects_p[i]->minor;
 618                 if(dev_minor>=0){
 619                         #ifdef CONFIG_DEVFS_FS
 620                         devfs_remove("can%d", dev_minor);
 621                         #endif
 622                         #if  LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,25)
 623                         class_device_destroy(can_class, MKDEV(major, dev_minor));
 624                         #else /* >= 2.6.26 */
 625                         device_destroy(can_class, MKDEV(major, dev_minor));
 626                         #endif /* >= 2.6.26 */
 627                 }
 628                 #endif
 629         }
 630 #endif
 631
 632         for(i=0;i<MAX_TOT_CHIPS;i++){
 633                 if(!chips_p[i]) continue;
 634                 if(chips_p[i]->hostdevice != dev) continue;
 635                 chips_p[i]=NULL;
 636         }
 637
 638         hardware_p->candevice[dev->candev_idx]=NULL;
 639         hardware_p->nr_boards--;
 640         hw[dev->candev_idx]=NULL;
 641
 642         candevice_done(dev);
 643         can_checked_free(dev);
 644 }
 645
 646
 647
 648
 649 void cleanup_module(void)
 650 {
 651 #if defined(CONFIG_DEVFS_FS) || (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0))
 652         int i=0;
 653 #endif
 654
 655 #if defined(CONFIG_OC_LINCAN_CARD_usbcan)
 656         DEBUGMSG("Unregistering usbcan.\n");
 657         usbcan_exit();
 658 #endif
 659
 660         DEBUGMSG("Continuing with coldplug cleanup.\n");
 661 #ifdef CONFIG_PROC_FS
 662         if (can_delete_procdir())
 663                 CANMSG("Error unregistering /proc/can entry.\n");
 664 #endif
 665
 666 #if defined(CONFIG_DEVFS_FS) || (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0))
 667         for(i=0;i<MAX_TOT_MSGOBJS;i++) {
 668             #if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,0))
 669                 if(devfs_handles[i])
 670                         devfs_unregister(devfs_handles[i]);
 671             #else
 672                 int dev_minor;
 673                 if(!objects_p[i]) continue;
 674                 dev_minor=objects_p[i]->minor;
 675                 if(minor>=0){
 676                     #ifdef CONFIG_DEVFS_FS
 677                         devfs_remove("can%d", dev_minor);
 678                     #endif
 679                     #if  LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,25)
 680                         class_device_destroy(can_class, MKDEV(major, dev_minor));
 681                     #else /* >= 2.6.26 */
 682                         device_destroy(can_class, MKDEV(major, dev_minor));
 683                     #endif /* >= 2.6.26 */
 684                 }
 685             #endif
 686         }
 687 #endif
 688
 689 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0))
 690         class_destroy(can_class);
 691 #endif
 692
 693         canhardware_done(hardware_p);
 694
 695         #ifdef CAN_WITH_RTL
 696         rtl_unregister_rtldev(major,DEVICE_NAME);
 697         canqueue_rtl_done();
 698         #endif /*CAN_WITH_RTL*/
 699
 700         DEBUGMSG("Can hardware cleanup done, freeing memory.\n");
 701
 702         if ( can_del_mem_list() )
 703                 CANMSG("Error deallocating memory\n");
 704
 705         unregister_chrdev(major,DEVICE_NAME);
 706 }